diff --git a/manifest b/manifest
index 0905616d4a..e298f1e67f 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Add\sretry\slogic\sfor\sAV\sdefense\sto\swinOpen.\s\sAlso,\srefactor\stest\ssuite\sto\sallow\sthe\skey\sTcl\sfile\soperations\s(e.g.\scopy\sand\sdelete)\sto\sbe\sretried.
-D 2011-08-02T00:57:34.578
+C Merge\sthe\slatest\strunk\schanges\sinto\sthe\swinopen-retry-logic\sbranch.
+D 2011-08-02T19:42:38.461
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 1e6988b3c11dee9bd5edc0c804bd4468d74a9cdc
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -250,7 +250,7 @@ F src/vtab.c 901791a47318c0562cd0c676a2c6ff1bc530e582
 F src/wal.c 3154756177d6219e233d84291d5b05f4e06ff5e9
 F src/wal.h 66b40bd91bc29a5be1c88ddd1f5ade8f3f48728a
 F src/walker.c 3112bb3afe1d85dc52317cb1d752055e9a781f8f
-F src/where.c 106cd9ab3eb410dfa7d0598194c277664bb2e9a3
+F src/where.c 7d09f4c1512affb60cc1190a4b33d121d4ce039a
 F test/8_3_names.test 631ea964a3edb091cf73c3b540f6bcfdb36ce823
 F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
 F test/alias.test 4529fbc152f190268a15f9384a5651bbbabc9d87
@@ -616,7 +616,7 @@ F test/pageropt.test 8146bf448cf09e87bb1867c2217b921fb5857806
 F test/pagesize.test 1dd51367e752e742f58e861e65ed7390603827a0
 F test/pcache.test 065aa286e722ab24f2e51792c1f093bf60656b16
 F test/pcache2.test 9f9357bb0f463b87bdf695646024ed2031a0c85a
-F test/permutations.test aae89941ca0968b53633c97b5dd0d6f9f9899d27
+F test/permutations.test 434b3c91168969cee1385663748106f5f13b2f9c
 F test/pragma.test c8108e01da04f16e67e5754e610bc62c1b993f6c
 F test/pragma2.test 3a55f82b954242c642f8342b17dffc8b47472947
 F test/printf.test 05970cde31b1a9f54bd75af60597be75a5c54fea
@@ -874,6 +874,7 @@ F test/vtabB.test 04df5dc531b9f44d9ca65b9c1b79f12b5922a796
 F test/vtabC.test 4528f459a13136f982e75614d120aef165f17292
 F test/vtabD.test 74167b1578e5886fe4c886d6bef2fd1406444c42
 F test/vtabE.test 7c4693638d7797ce2eda17af74292b97e705cc61
+F test/vtabF.test fd5ad376f5a34fe0891df1f3cddb4fe7c3eb077e
 F test/vtab_alter.test 9e374885248f69e251bdaacf480b04a197f125e5
 F test/vtab_err.test 0d4d8eb4def1d053ac7c5050df3024fd47a3fbd8
 F test/vtab_shared.test 0eff9ce4f19facbe0a3e693f6c14b80711a4222d
@@ -953,10 +954,7 @@ F tool/symbols.sh caaf6ccc7300fd43353318b44524853e222557d5
 F tool/tostr.awk 11760e1b94a5d3dcd42378f3cc18544c06cfa576
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
 F tool/warnings.sh 2ebae31e1eb352696f3c2f7706a34c084b28c262
-P ed630b012f468d6779b83dd8c4dbf3a8dafee573
-R 735027666e11a1bb5deb1c9d66f6a810
-T *branch * winopen-retry-logic
-T *sym-winopen-retry-logic *
-T -sym-trunk *
-U mistachkin
-Z 48ff1b46b7d2b6052641cde313ef9900
+P 9007586fdabed8dbcc78581ea9821cfd1f9a4c8c 2bbf3150a4b7108e88ed81c1d40af6f06089e148
+R ed676f9c5b5c5c1cb85f45ddea5340b8
+U drh
+Z a5575159f660bba167a59a6dccad64eb
diff --git a/manifest.uuid b/manifest.uuid
index 04c96eaa22..04d765101d 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-9007586fdabed8dbcc78581ea9821cfd1f9a4c8c
\ No newline at end of file
+8bef97a0eb2f56d0ac374d97e97e0a44c7f99aee
\ No newline at end of file
diff --git a/src/where.c b/src/where.c
index d312232868..21fb7f45f4 100644
--- a/src/where.c
+++ b/src/where.c
@@ -2142,6 +2142,7 @@ static sqlite3_index_info *allocateIndexInfo(
     testcase( pTerm->eOperator==WO_IN );
     testcase( pTerm->eOperator==WO_ISNULL );
     if( pTerm->eOperator & (WO_IN|WO_ISNULL) ) continue;
+    if( pTerm->wtFlags & TERM_VNULL ) continue;
     nTerm++;
   }
 
@@ -2192,6 +2193,7 @@ static sqlite3_index_info *allocateIndexInfo(
     testcase( pTerm->eOperator==WO_IN );
     testcase( pTerm->eOperator==WO_ISNULL );
     if( pTerm->eOperator & (WO_IN|WO_ISNULL) ) continue;
+    if( pTerm->wtFlags & TERM_VNULL ) continue;
     pIdxCons[j].iColumn = pTerm->u.leftColumn;
     pIdxCons[j].iTermOffset = i;
     pIdxCons[j].op = (u8)pTerm->eOperator;
diff --git a/test/permutations.test b/test/permutations.test
index 57f69462a5..f9414263d1 100644
--- a/test/permutations.test
+++ b/test/permutations.test
@@ -726,7 +726,7 @@ test_suite "journaltest" -description {
   unregister_jt_vfs
 } -files [test_set $::allquicktests -exclude {
   wal* incrvacuum.test ioerr.test corrupt4.test io.test crash8.test 
-  async4.test bigfile.test
+  async4.test bigfile.test backcompat.test
 }]
 
 if {[info commands register_demovfs] != ""} {
@@ -865,4 +865,3 @@ if {[info script] == $argv0} {
   main $argv
   finish_test
 }
-
diff --git a/test/vtabF.test b/test/vtabF.test
new file mode 100644
index 0000000000..b9341ea597
--- /dev/null
+++ b/test/vtabF.test
@@ -0,0 +1,45 @@
+# 2011 Aug 1
+#
+# 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.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library. 
+# This file checks to make sure IS NOT NULL constraints work on
+# virtual tables.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+ifcapable !vtab||!schema_pragmas { finish_test ; return }
+
+# Register the echo module
+register_echo_module [sqlite3_connection_pointer db]
+
+do_test vtabE-1.1 {
+  execsql {
+    CREATE TABLE t1(a, b);
+    CREATE INDEX i1 ON t1(a);
+    CREATE INDEX i2 ON t1(b);
+    INSERT INTO t1 VALUES(10,110);
+    INSERT INTO t1 VALUES(11,111);
+    INSERT INTO t1 SELECT a+2, b+2 FROM t1;
+    INSERT INTO t1 SELECT null, b+4 FROM t1;
+    INSERT INTO t1 SELECT null, b+8 FROM t1;
+    INSERT INTO t1 SELECT null, b+16 FROM t1;
+    ANALYZE;
+    CREATE VIRTUAL TABLE tv1 USING echo(t1);
+    SELECT b FROM t1 WHERE a IS NOT NULL;
+  }
+} {110 111 112 113}
+do_test vtabE-1.2 {
+  execsql {SELECT b FROM tv1 WHERE a IS NOT NULL}
+} {110 111 112 113}
+
+
+finish_test