diff --git a/manifest b/manifest
index 060a723fae..56b649c34b 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Add\sPRAGMA\sforeign_key_check.\s\sName\sthe\schild\sand\sparent\stables\sas\spart\sof\na\s"foreign\skey\smismatch"\serror.
-D 2012-12-20T01:15:20.959
+C Ensure\sthe\sdatabase\ssize\sfield\sin\sthe\sdb\sheader\sof\sa\sbackup\sdatabase\sis\sset\scorrectly.\sFix\sfor\s[0cfd98ee201].
+D 2012-12-21T16:15:35.911
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 690d441a758cbffd13e814dc2724a721a6ebd400
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -118,7 +118,7 @@ F src/alter.c f8db986c03eb0bfb221523fc9bbb9d0b70de3168
 F src/analyze.c 7553068d21e32a57fc33ab6b2393fc8c1ba41410
 F src/attach.c ea5247f240e2c08afd608e9beb380814b86655e1
 F src/auth.c 523da7fb4979469955d822ff9298352d6b31de34
-F src/backup.c cab40f2c1fe79d6eb93d3b4086c78c41ad2fa5d0
+F src/backup.c 32e35a3a4ea55b45c0e5f74eeb793aec71491517
 F src/bitvec.c 26675fe8e431dc555e6f2d0e11e651d172234aa1
 F src/btmutex.c 976f45a12e37293e32cae0281b15a21d48a8aaa7
 F src/btree.c 7a80e4a67f32a2494c383a28a495bf3bd71cc230
@@ -407,7 +407,7 @@ F test/exists.test 8f7b27b61c2fbe5822f0a1f899c715d14e416e30
 F test/expr.test 67c9fd6f8f829e239dc8b0f4a08a73c08b09196d
 F test/fallocate.test b5d34437bd7ab01d41b1464b8117aefd4d32160e
 F test/filectrl.test 14fa712e42c4cb791e09dfd58a6a03efb47ef13a
-F test/filefmt.test ffa17b5aebc3eb4b1e3be1ccb5ee906ffbd97f6e
+F test/filefmt.test dbee33e57818249cdffbbb7b13464635217beff1
 F test/fkey1.test 01c7de578e11747e720c2d9aeef27f239853c4da
 F test/fkey2.test 5aa44e7153928a1f002803f94aaab4c76a7ceac2
 F test/fkey3.test 5ec899d12b13bcf1e9ef40eff7fb692fdb91392e
@@ -1028,7 +1028,7 @@ F tool/vdbe-compress.tcl f12c884766bd14277f4fcedcae07078011717381
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
 F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac
-P b3c9e8f81275fe07272c01f66b16c16417f034af b5a8f3160b5dc1397312add3c5410e7e0a12b75e
-R c25a7b70b2b47eedc79e89bea857f6d5
-U drh
-Z 54888f90388c5aea5593479ed7ab2502
+P e408dc9080594dc464b8763dece6b365772c6105
+R 029b6fc924e25c670b20c53f3ff270ca
+U dan
+Z feee379cb7d3362de52284de8aba8c99
diff --git a/manifest.uuid b/manifest.uuid
index 8c078e7bb1..75e67ccb96 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-e408dc9080594dc464b8763dece6b365772c6105
\ No newline at end of file
+ff6857b6ed6a46671006b75157d8cf853a816ef9
\ No newline at end of file
diff --git a/src/backup.c b/src/backup.c
index b234716d61..d3614b88c3 100644
--- a/src/backup.c
+++ b/src/backup.c
@@ -212,7 +212,12 @@ static int isFatalError(int rc){
 ** page iSrcPg from the source database. Copy this data into the 
 ** destination database.
 */
-static int backupOnePage(sqlite3_backup *p, Pgno iSrcPg, const u8 *zSrcData){
+static int backupOnePage(
+  sqlite3_backup *p,              /* Backup handle */
+  Pgno iSrcPg,                    /* Source database page to backup */
+  const u8 *zSrcData,             /* Source database page data */
+  int bUpdate                     /* True for an update, false otherwise */
+){
   Pager * const pDestPager = sqlite3BtreePager(p->pDest);
   const int nSrcPgsz = sqlite3BtreeGetPageSize(p->pSrc);
   int nDestPgsz = sqlite3BtreeGetPageSize(p->pDest);
@@ -285,6 +290,9 @@ static int backupOnePage(sqlite3_backup *p, Pgno iSrcPg, const u8 *zSrcData){
       */
       memcpy(zOut, zIn, nCopy);
       ((u8 *)sqlite3PagerGetExtra(pDestPg))[0] = 0;
+      if( iOff==0 && bUpdate==0 ){
+        sqlite3Put4byte(&zOut[28], sqlite3BtreeLastPage(p->pSrc));
+      }
     }
     sqlite3PagerUnref(pDestPg);
   }
@@ -391,7 +399,7 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
         DbPage *pSrcPg;                             /* Source page object */
         rc = sqlite3PagerGet(pSrcPager, iSrcPg, &pSrcPg);
         if( rc==SQLITE_OK ){
-          rc = backupOnePage(p, iSrcPg, sqlite3PagerGetData(pSrcPg));
+          rc = backupOnePage(p, iSrcPg, sqlite3PagerGetData(pSrcPg), 0);
           sqlite3PagerUnref(pSrcPg);
         }
       }
@@ -639,7 +647,7 @@ void sqlite3BackupUpdate(sqlite3_backup *pBackup, Pgno iPage, const u8 *aData){
       int rc;
       assert( p->pDestDb );
       sqlite3_mutex_enter(p->pDestDb->mutex);
-      rc = backupOnePage(p, iPage, aData);
+      rc = backupOnePage(p, iPage, aData, 1);
       sqlite3_mutex_leave(p->pDestDb->mutex);
       assert( rc!=SQLITE_BUSY && rc!=SQLITE_LOCKED );
       if( rc!=SQLITE_OK ){
diff --git a/test/filefmt.test b/test/filefmt.test
index 1165cd62d5..bc1af18e8b 100644
--- a/test/filefmt.test
+++ b/test/filefmt.test
@@ -213,4 +213,39 @@ do_execsql_test filefmt-3.3 {
   PRAGMA integrity_check;
 } {ok}
 
+reset_db
+do_execsql_test filefmt-4.1 {
+  PRAGMA auto_vacuum = 1;
+  CREATE TABLE t1(x, y);
+  CREATE TABLE t2(x, y);
+
+  INSERT INTO t1 VALUES(randomblob(100), randomblob(100));
+  INSERT INTO t1 VALUES(randomblob(100), randomblob(100));
+  INSERT INTO t1 VALUES(randomblob(100), randomblob(100));
+  INSERT INTO t1 VALUES(randomblob(100), randomblob(100));
+  INSERT INTO t1 VALUES(randomblob(100), randomblob(100));
+  INSERT INTO t1 VALUES(randomblob(100), randomblob(100));
+
+  INSERT INTO t2 SELECT randomblob(100), randomblob(100) FROM t1;
+  INSERT INTO t2 SELECT randomblob(100), randomblob(100) FROM t1;
+  INSERT INTO t2 SELECT randomblob(100), randomblob(100) FROM t1;
+  INSERT INTO t2 SELECT randomblob(100), randomblob(100) FROM t1;
+}
+
+do_test filefmt-4.2 { 
+  sql36231 { INSERT INTO t2 SELECT * FROM t1 }
+} {}
+
+do_test filefmt-4.3 { 
+  forcedelete bak.db
+  db backup bak.db
+} {}
+
+do_test filefmt-4.4 { 
+  sqlite3 db2 bak.db
+  db2 eval { PRAGMA integrity_check }
+} {ok}
+db2 close
+
 finish_test
+