diff --git a/manifest b/manifest
index e8f2288842..16f4057920 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Disable\smemory-mapped\sI/O\sfor\sthe\swin32lock.test\smodule
-D 2013-04-04T17:28:11.286
+C Add\sfurther\smulti-client\stests\sto\smmap1.test.
+D 2013-04-04T19:32:53.279
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in aafa71d66bab7e87fb2f348152340645f79f0244
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -631,7 +631,7 @@ F test/misc5.test 528468b26d03303b1f047146e5eefc941b9069f5
 F test/misc6.test 953cc693924d88e6117aeba16f46f0bf5abede91
 F test/misc7.test dd82ec9250b89178b96cd28b2aca70639d21e5b3
 F test/misuse.test ba4fb5d1a6101d1c171ea38b3c613d0661c83054
-F test/mmap1.test df5105f08e6000e57b4de7e748f8c2ae3fed75da
+F test/mmap1.test 146a755bb382677b6f9993c61ddc7732b157d730
 F test/mmap2.test 62dbb5d718e66d654d232116c5a2d96e26a071a5
 F test/multiplex.test e08cc7177bd6d85990ee1d71100bb6c684c02256
 F test/multiplex2.test 580ca5817c7edbe4cc68fa150609c9473393003a
@@ -1044,7 +1044,7 @@ F tool/vdbe-compress.tcl f12c884766bd14277f4fcedcae07078011717381
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
 F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac
-P 51fab480d0487107709e6c9e00bc0512b82ef1aa
-R c0f8ddd1641a176c1bcbffa647af40c5
-U drh
-Z f901f35bfd9928cf6d746ecf21982f94
+P 2b3d9805a28e51f646113e22c2dff2272342306e
+R 4c631120a8e96e37be49975ee7d63ac7
+U dan
+Z d6d074a538192756f7d91b52bba8b7ce
diff --git a/manifest.uuid b/manifest.uuid
index d4cf081120..d68eca1adf 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-2b3d9805a28e51f646113e22c2dff2272342306e
\ No newline at end of file
+a107f75d93b8acd3403d8473a75137378041a833
\ No newline at end of file
diff --git a/test/mmap1.test b/test/mmap1.test
index 805fb76525..417a0756b1 100644
--- a/test/mmap1.test
+++ b/test/mmap1.test
@@ -24,10 +24,22 @@ proc nRead {db} {
   return $stats(read)
 }
 
+proc register_rblob_code {dbname seed} {
+  return [subst -nocommands {
+    set ::rcnt $seed
+    proc rblob {n} {
+      set ::rcnt [expr (([set ::rcnt] << 3) + [set ::rcnt] + 456) & 0xFFFFFFFF]
+      set str [format %.8x [expr [set ::rcnt] ^ 0xbdf20da3]] 
+      string range [string repeat [set str] [expr [set n]/4]] 1 [set n]
+    }
+    $dbname func rblob rblob
+  }]
+}
+
 foreach {t mmap_limit nRead c2init} {
-  1.1 { PRAGMA mmap_limit = 67108864 }   4 {}
-  1.2 { PRAGMA mmap_limit =    53248 } 150 {}
-  1.3 { PRAGMA mmap_limit =        0 } 344 {}
+  1.1 { PRAGMA mmap_limit = 67108864 }   4 {PRAGMA mmap_limit = 0}
+  1.2 { PRAGMA mmap_limit =    53248 } 150 {PRAGMA mmap_limit = 0}
+  1.3 { PRAGMA mmap_limit =        0 } 344 {PRAGMA mmap_limit = 0}
   1.4 { PRAGMA mmap_limit = 67108864 }   4 {PRAGMA mmap_limit = 67108864 }
   1.5 { PRAGMA mmap_limit =    53248 } 150 {PRAGMA mmap_limit = 67108864 }
   1.6 { PRAGMA mmap_limit =        0 } 344 {PRAGMA mmap_limit = 67108864 }
@@ -37,15 +49,7 @@ foreach {t mmap_limit nRead c2init} {
     sql1 $mmap_limit
     sql2 $c2init
 
-    code2 {
-      set ::rcnt 0
-      proc rblob {n} {
-        set ::rcnt [expr (($::rcnt << 3) + $::rcnt + 456) & 0xFFFFFFFF]
-        set str [format %.8x [expr $::rcnt ^ 0xbdf20da3]] 
-        string range [string repeat $str [expr $n/4]] 1 $n
-      }
-      db2 func rblob rblob
-    }
+    code2 [register_rblob_code db2 0]
 
     sql2 {
       PRAGMA page_size=1024;
@@ -245,6 +249,67 @@ do_test 5.5 {
   sqlite3_finalize $::STMT
 } SQLITE_OK
 
+#-------------------------------------------------------------------------
+# Test various mmap_limit settings.
+#
+foreach {tn1 mmap1 mmap2} {
+     1 6144       167773
+     2 18432      140399
+     3 43008      401302
+     4 92160      253899
+     5 190464          2
+     6 387072     752431
+     7 780288     291143
+     8 1566720    594306
+     9 3139584    829137
+     10 6285312   793963
+     11 12576768 1015590
+} {
+  do_multiclient_test tn {
+    sql1 {
+      CREATE TABLE t1(a PRIMARY KEY);
+      CREATE TABLE t2(x);
+      INSERT INTO t2 VALUES('');
+    }
+
+    code1 [register_rblob_code db  0]
+    code2 [register_rblob_code db2 444]
+
+    sql1 "PRAGMA mmap_limit = $mmap1"
+    sql2 "PRAGMA mmap_limit = $mmap2"
+
+    do_test $tn1.$tn { 
+      for {set i 1} {$i <= 100} {incr i} {
+        if {$i % 2} {
+          set c1 sql1
+            set c2 sql2
+        } else {
+          set c1 sql2
+            set c2 sql1
+        }
+
+        $c1 {
+          INSERT INTO t1 VALUES( rblob(5000) );
+          UPDATE t2 SET x = (SELECT md5sum(a) FROM t1);
+        }
+
+        set res [$c2 { 
+            SELECT count(*) FROM t1;
+            SELECT x == (SELECT md5sum(a) FROM t1) FROM t2;
+            PRAGMA integrity_check;
+        }]
+        if {$res != [list $i 1 ok]} {
+          do_test $tn1.$tn.$i {
+            set ::res
+          } [list $i 1 ok]
+        }
+      }
+      set res 1
+    } {1}
+  }
+}
+
+
 finish_test