diff --git a/ext/rtree/rtree.c b/ext/rtree/rtree.c
index 5665e6aa8c..d47c1092ef 100644
--- a/ext/rtree/rtree.c
+++ b/ext/rtree/rtree.c
@@ -3133,7 +3133,7 @@ static void rtreenode(sqlite3_context *ctx, int nArg, sqlite3_value **apArg){
     int jj;
 
     nodeGetCell(&tree, &node, ii, &cell);
-    sqlite3_snprintf(512-nCell,&zCell[nCell],"%d", cell.iRowid);
+    sqlite3_snprintf(512-nCell,&zCell[nCell],"%lld", cell.iRowid);
     nCell = strlen(zCell);
     for(jj=0; jj<tree.nDim*2; jj++){
       sqlite3_snprintf(512-nCell,&zCell[nCell]," %f",(double)cell.aCoord[jj].f);
diff --git a/ext/rtree/rtreeB.test b/ext/rtree/rtreeB.test
new file mode 100644
index 0000000000..98c9c2b1ff
--- /dev/null
+++ b/ext/rtree/rtreeB.test
@@ -0,0 +1,34 @@
+# 2011 March 2
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# Make sure the rtreenode() testing function can handle entries with
+# 64-bit rowids.
+# 
+
+if {![info exists testdir]} {
+  set testdir [file join [file dirname [info script]] .. .. test]
+} 
+source $testdir/tester.tcl
+ifcapable !rtree { finish_test ; return }
+
+do_test rtreeB-1.1 {
+  db eval {
+    CREATE VIRTUAL TABLE t1 USING rtree(ii, x0, y0, x1, y1);
+    INSERT INTO t1 VALUES(1073741824, 0.0, 0.0, 100.0, 100.0);
+    INSERT INTO t1 VALUES(2147483646, 0.0, 0.0, 200.0, 200.0);
+    INSERT INTO t1 VALUES(4294967296, 0.0, 0.0, 300.0, 300.0);
+    INSERT INTO t1 VALUES(8589934592, 20.0, 20.0, 150.0, 150.0);
+    INSERT INTO t1 VALUES(9223372036854775807, 150, 150, 400, 400);
+    SELECT rtreenode(2, data) FROM t1_node;
+  }
+} {{1073741824 0.000000 0.000000 100.000000 100.000000} {2147483646 0.000000 0.000000 200.000000 200.000000} {4294967296 0.000000 0.000000 300.000000 300.000000} {8589934592 20.000000 20.000000 150.000000 150.000000} {9223372036854775807 150.000000 150.000000 400.000000 400.000000}}
+
+
+finish_test
diff --git a/manifest b/manifest
index db71d0c060..8febb8aa67 100644
--- a/manifest
+++ b/manifest
@@ -1,8 +1,8 @@
 -----BEGIN PGP SIGNED MESSAGE-----
 Hash: SHA1
 
-C Proof-of-concept\sprototype\sfor\sthe\sproposed\sxSetSystemCall\sextension\smethod\non\sthe\sVFS.
-D 2011-03-02T15:09:07.461
+C Add\smore\ssystem\scalls\sto\sthe\sset\sthat\scan\sbe\soverridden\sin\sos_unix.c.\nAlso\smerge\sin\srecent\sfixes\sfrom\strunk.
+D 2011-03-02T18:01:10.609
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 27701a1653595a1f2187dc61c8117e00a6c1d50f
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -84,7 +84,7 @@ F ext/icu/README.txt bf8461d8cdc6b8f514c080e4e10dc3b2bbdfefa9
 F ext/icu/icu.c 850e9a36567bbcce6bd85a4b68243cad8e3c2de2
 F ext/icu/sqliteicu.h 728867a802baa5a96de7495e9689a8e01715ef37
 F ext/rtree/README 6315c0d73ebf0ec40dedb5aa0e942bc8b54e3761
-F ext/rtree/rtree.c 05b293c85403cf39bb5af0e7c010b0cafeab5e47
+F ext/rtree/rtree.c 115b499415ddef9be75615ced99b11232826e64d
 F ext/rtree/rtree.h 834dbcb82dc85b2481cde6a07cdadfddc99e9b9e
 F ext/rtree/rtree1.test dbd4250ac0ad367a262eb9676f7e3080b0368206
 F ext/rtree/rtree2.test acbb3a4ce0f4fbc2c304d2b4b784cfa161856bba
@@ -96,6 +96,7 @@ F ext/rtree/rtree7.test bcb647b42920b3b5d025846689147778485cc318
 F ext/rtree/rtree8.test 9772e16da71e17e02bdebf0a5188590f289ab37d
 F ext/rtree/rtree9.test df9843d1a9195249c8d3b4ea6aedda2d5c73e9c2
 F ext/rtree/rtreeA.test ace05e729a36e342d40cf94e9efc7b4723d9dcdf
+F ext/rtree/rtreeB.test cd45c955cd35a325545671723255f71f2ae9c2e7
 F ext/rtree/rtree_perf.tcl 6c18c1f23cd48e0f948930c98dfdd37dfccb5195
 F ext/rtree/rtree_util.tcl 06aab2ed5b826545bf215fff90ecb9255a8647ea
 F ext/rtree/sqlite3rtree.h 1af0899c63a688e272d69d8e746f24e76f10a3f0
@@ -164,7 +165,7 @@ F src/os.c 22ac61d06e72a0dac900400147333b07b13d8e1d
 F src/os.h 9dbed8c2b9c1f2f2ebabc09e49829d4777c26bf9
 F src/os_common.h a8f95b81eca8a1ab8593d23e94f8a35f35d4078f
 F src/os_os2.c 2e452c9f2ca507623ad351c33a8a8b27849b1863
-F src/os_unix.c 34f0341ab45ba2708714c8e3f7bd35c7ccb5e34d
+F src/os_unix.c a13aa2394c337a51f818b33e8abb5922bcd25cbb
 F src/os_win.c c2df806a8510ec8c2c2c30fb78b3a25bc1b2f325
 F src/pager.c 6aa906b60a59664ba58d3f746164bb010d407ce1
 F src/pager.h 3f8c783de1d4706b40b1ac15b64f5f896bcc78d1
@@ -912,18 +913,14 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
-P 7b6e30e6a712311d4ef275253b085b85e6e17116
-R b432d469c6ed4dca97f566fa093fcbff
-T *bgcolor * #a8d3c0
-T *branch * syscall-override
-T *sym-syscall-override *
-T -sym-trunk *
+P 92b5a76abc53290e1bb87b6b55bc64bb1b331dfc ec55e8c6bb4f2419b3813aa2fd1a20d8f5016159
+R 3565d6dc7b759fbd44b8dfd37d76ad07
 U drh
-Z 9b09403dc20dd3b2e37d470a4feaa93c
+Z d880c71a14ae5250c2798782141ecbce
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.6 (GNU/Linux)
 
-iD8DBQFNbl2aoxKgR168RlERAnuDAJ9BNtRHzGqMMOlHR9sjdCvks/uYWQCgiUgt
-CkJFrHO5mCcgtbaMpvVY+k0=
-=K2zl
+iD8DBQFNboXpoxKgR168RlERAi5qAJ48oWmqxPjfRV4pFj4iAbQCs6u9fQCeNLi2
+M/sSIPhA4/GCd6qHTyrGyKQ=
+=Ttvh
 -----END PGP SIGNATURE-----
diff --git a/manifest.uuid b/manifest.uuid
index ee6de5d921..3647910982 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-92b5a76abc53290e1bb87b6b55bc64bb1b331dfc
\ No newline at end of file
+80fac2a6e07221bb67613af84ab9dda3e18b5ceb
\ No newline at end of file
diff --git a/src/os_unix.c b/src/os_unix.c
index d2263addc6..18ec658701 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -323,9 +323,56 @@ static struct unix_syscall {
   { "ftruncate",    (void*)ftruncate,  0  },
 #define osFtruncate ((int(*)(int,off_t))aSyscall[6].pCurrent)
 
-  { "fcntl",        (void*)fcntl,    0  },
+  { "fcntl",        (void*)fcntl,      0  },
 #define osFcntl     ((int(*)(int,int,...))aSyscall[7].pCurrent)
-};
+
+  { "read",         (void*)read,       0  },
+#define osRead      ((ssize_t(*)(int,void*,size_t))aSyscall[8].pCurrent)
+
+#if defined(USE_PREAD) || defined(SQLITE_ENABLE_LOCKING_STYLE)
+  { "pread",        (void*)pread,      0  },
+#else
+  { "pread",        (void*)0,          0  },
+#endif
+#define osPread     ((ssize_t(*)(int,void*,size_t,off_t))aSyscall[9].pCurrent)
+
+#if defined(USE_PREAD64)
+  { "pread64",      (void*)pread64,    0  },
+#else
+  { "pread64",      (void*)0,          0  },
+#endif
+#define osPread64   ((ssize_t(*)(int,void*,size_t,off_t))aSyscall[10].pCurrent)
+
+  { "write",        (void*)write,      0  },
+#define osWrite     ((ssize_t(*)(int,const void*,size_t))aSyscall[11].pCurrent)
+
+#if defined(USE_PREAD) || defined(SQLITE_ENABLE_LOCKING_STYLE)
+  { "pwrite",       (void*)pwrite,     0  },
+#else
+  { "pwrite",       (void*)0,          0  },
+#endif
+#define osPwrite    ((ssize_t(*)(int,const void*,size_t,off_t))\
+                    aSyscall[12].pCurrent)
+
+#if defined(USE_PREAD64)
+  { "pwrite64",     (void*)pwrite64,   0  },
+#else
+  { "pwrite64",     (void*)0,          0  },
+#endif
+#define osPwrite64  ((ssize_t(*)(int,const void*,size_t,off_t))\
+                    aSyscall[13].pCurrent)
+
+  { "fchmod",       (void*)fchmod,     0  },
+#define osFchmod    ((int(*)(int,mode_t))aSyscall[14].pCurrent)
+
+#if defined(HAVE_POSIX_FALLOCATE) && HAVE_POSIX_FALLOCATE
+  { "fallocate",    (void*)posix_fallocate,  0 },
+#else
+  { "fallocate",    (void*)0,                0 },
+#endif
+#define osFallocate ((int(*)(int,off_t,off_t)aSyscall[15].pCurrent)
+
+}; /* End of the overrideable system calls */
 
 /*
 ** This is the xSetSystemCall() method of sqlite3_vfs for all of the
@@ -1011,7 +1058,7 @@ static int findInodeInfo(
   ** the first page of the database, no damage is done.
   */
   if( statbuf.st_size==0 && (pFile->fsFlags & SQLITE_FSFLAGS_IS_MSDOS)!=0 ){
-    do{ rc = write(fd, "S", 1); }while( rc<0 && errno==EINTR );
+    do{ rc = osWrite(fd, "S", 1); }while( rc<0 && errno==EINTR );
     if( rc!=1 ){
       pFile->lastErrno = errno;
       return SQLITE_IOERR;
@@ -2783,10 +2830,10 @@ static int seekAndRead(unixFile *id, sqlite3_int64 offset, void *pBuf, int cnt){
 #endif
   TIMER_START;
 #if defined(USE_PREAD)
-  do{ got = pread(id->h, pBuf, cnt, offset); }while( got<0 && errno==EINTR );
+  do{ got = osPread(id->h, pBuf, cnt, offset); }while( got<0 && errno==EINTR );
   SimulateIOError( got = -1 );
 #elif defined(USE_PREAD64)
-  do{ got = pread64(id->h, pBuf, cnt, offset); }while( got<0 && errno==EINTR );
+  do{ got = osPread64(id->h, pBuf, cnt, offset); }while( got<0 && errno==EINTR);
   SimulateIOError( got = -1 );
 #else
   newOffset = lseek(id->h, offset, SEEK_SET);
@@ -2799,7 +2846,7 @@ static int seekAndRead(unixFile *id, sqlite3_int64 offset, void *pBuf, int cnt){
     }
     return -1;
   }
-  do{ got = read(id->h, pBuf, cnt); }while( got<0 && errno==EINTR );
+  do{ got = osRead(id->h, pBuf, cnt); }while( got<0 && errno==EINTR );
 #endif
   TIMER_END;
   if( got<0 ){
@@ -2861,9 +2908,9 @@ static int seekAndWrite(unixFile *id, i64 offset, const void *pBuf, int cnt){
 #endif
   TIMER_START;
 #if defined(USE_PREAD)
-  do{ got = pwrite(id->h, pBuf, cnt, offset); }while( got<0 && errno==EINTR );
+  do{ got = osPwrite(id->h, pBuf, cnt, offset); }while( got<0 && errno==EINTR );
 #elif defined(USE_PREAD64)
-  do{ got = pwrite64(id->h, pBuf, cnt, offset); }while( got<0 && errno==EINTR );
+  do{ got = osPwrite64(id->h, pBuf, cnt, offset);}while( got<0 && errno==EINTR);
 #else
   newOffset = lseek(id->h, offset, SEEK_SET);
   if( newOffset!=offset ){
@@ -2874,7 +2921,7 @@ static int seekAndWrite(unixFile *id, i64 offset, const void *pBuf, int cnt){
     }
     return -1;
   }
-  do{ got = write(id->h, pBuf, cnt); }while( got<0 && errno==EINTR );
+  do{ got = osWrite(id->h, pBuf, cnt); }while( got<0 && errno==EINTR );
 #endif
   TIMER_END;
   if( got<0 ){
@@ -3237,7 +3284,7 @@ static int fcntlSizeHint(unixFile *pFile, i64 nByte){
 #if defined(HAVE_POSIX_FALLOCATE) && HAVE_POSIX_FALLOCATE
       int rc;
       do{
-        rc = posix_fallocate(pFile-.h, buf.st_size, nSize-buf.st_size;
+        rc = osFallocate(pFile->.h, buf.st_size, nSize-buf.st_size;
       }while( rc<0 && errno=EINTR );
       if( rc ) return SQLITE_IOERR_WRITE;
 #else
@@ -5115,7 +5162,7 @@ static int unixRandomness(sqlite3_vfs *NotUsed, int nBuf, char *zBuf){
       assert( sizeof(t)+sizeof(pid)<=(size_t)nBuf );
       nBuf = sizeof(t) + sizeof(pid);
     }else{
-      do{ nBuf = read(fd, zBuf, nBuf); }while( nBuf<0 && errno==EINTR );
+      do{ nBuf = osRead(fd, zBuf, nBuf); }while( nBuf<0 && errno==EINTR );
       robust_close(0, fd, __LINE__);
     }
   }
@@ -5638,7 +5685,7 @@ static int proxyBreakConchLock(unixFile *pFile, uuid_t myHostID){
     goto end_breaklock;
   }
   /* read the conch content */
-  readLen = pread(conchFile->h, buf, PROXY_MAXCONCHLEN, 0);
+  readLen = osPread(conchFile->h, buf, PROXY_MAXCONCHLEN, 0);
   if( readLen<PROXY_PATHINDEX ){
     sqlite3_snprintf(sizeof(errmsg),errmsg,"read error (len %d)",(int)readLen);
     goto end_breaklock;
@@ -5649,7 +5696,7 @@ static int proxyBreakConchLock(unixFile *pFile, uuid_t myHostID){
     sqlite3_snprintf(sizeof(errmsg), errmsg, "create failed (%d)", errno);
     goto end_breaklock;
   }
-  if( pwrite(fd, buf, readLen, 0) != (ssize_t)readLen ){
+  if( osPwrite(fd, buf, readLen, 0) != (ssize_t)readLen ){
     sqlite3_snprintf(sizeof(errmsg), errmsg, "write failed (%d)", errno);
     goto end_breaklock;
   }
@@ -5714,7 +5761,7 @@ static int proxyConchLock(unixFile *pFile, uuid_t myHostID, int lockType){
       
       if( nTries==2 ){  
         char tBuf[PROXY_MAXCONCHLEN];
-        int len = pread(conchFile->h, tBuf, PROXY_MAXCONCHLEN, 0);
+        int len = osPread(conchFile->h, tBuf, PROXY_MAXCONCHLEN, 0);
         if( len<0 ){
           pFile->lastErrno = errno;
           return SQLITE_IOERR_LOCK;
@@ -5884,17 +5931,16 @@ static int proxyTakeConch(unixFile *pFile){
          */
         if( rc==SQLITE_OK && createConch ){
           struct stat buf;
-          int rc;
           int err = osFstat(pFile->h, &buf);
           if( err==0 ){
             mode_t cmode = buf.st_mode&(S_IRUSR|S_IWUSR | S_IRGRP|S_IWGRP |
                                         S_IROTH|S_IWOTH);
             /* try to match the database file R/W permissions, ignore failure */
 #ifndef SQLITE_PROXY_DEBUG
-            fchmod(conchFile->h, cmode);
+            osFchmod(conchFile->h, cmode);
 #else
             do{
-              rc = fchmod(conchFile->h, cmode);
+              rc = osFchmod(conchFile->h, cmode);
             }while( rc==(-1) && errno==EINTR );
             if( rc!=0 ){
               int code = errno;
@@ -5917,7 +5963,7 @@ static int proxyTakeConch(unixFile *pFile){
       OSTRACE(("TRANSPROXY: CLOSE  %d\n", pFile->h));
       if( rc==SQLITE_OK && pFile->openFlags ){
         if( pFile->h>=0 ){
-          robust_close(pFile, pFile->h, __LINE__) ){
+          robust_close(pFile, pFile->h, __LINE__);
         }
         pFile->h = -1;
         int fd = osOpen(pCtx->dbPath, pFile->openFlags,