diff --git a/manifest b/manifest
index 651541bf00..b2efeec10f 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Rename\ssome\svariables\sto\savoid\shiding\sothers.\sAlso\sadd\s"static"\sto\stwo\sfunction\ssignatures\sthat\swere\smissing\sit.\s(CVS\s3024)
-D 2006-01-24T12:09:18
+C Return\scode\swas\sbeing\sdropped\sbecause\sof\soverridden\svariable\sin\sOP_IsUnique.\sFix\sthis\sand\sthe\stest\slogic\sproblem\sthat\shid\sit.\s(CVS\s3025)
+D 2006-01-24T13:09:33
 F Makefile.in 53841eb72e9eeb6030a8ce28c2595a92f440fd10
 F Makefile.linux-gcc 74ba0eadf88748a9ce3fd03d2a3ede2e6715baec
 F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
@@ -48,7 +48,7 @@ F src/hash.c 8747cf51d12de46512880dfcf1b68b4e24072863
 F src/hash.h 1b0c445e1c89ff2aaad9b4605ba61375af001e84
 F src/insert.c 7e931b7f06afbcefcbbaab175c02eff8268db33f
 F src/legacy.c 86b669707b3cefd570e34154e2f6457547d1df4f
-F src/main.c 439168db0a830efd0b9e7325aff39adc5524a1b5
+F src/main.c dc3fc9b02b1a022574d6e12d25abe58b93b85b1f
 F src/md5.c c5fdfa5c2593eaee2e32a5ce6c6927c986eaf217
 F src/os.c 59f05de8c5777c34876607114a2fbe55ae578235
 F src/os.h 93035a0e3b9dd05cdd0aaef32ea28ca28e02fe78
@@ -59,7 +59,7 @@ F src/os_unix.c b25eca667f926d24b542fb20378b3665feccfe2b
 F src/os_unix.h 5768d56d28240d3fe4537fac08cc85e4fb52279e
 F src/os_win.c 566bf7b41b72556fd7dca390bceaa2769dc395e9
 F src/os_win.h 41a946bea10f61c158ce8645e7646b29d44f122b
-F src/pager.c c4d18015a4eadebe91cffe2a9e08011c134e5aa2
+F src/pager.c c9fdc3f4026f22e73d8fa586c4f58e14129036bb
 F src/pager.h e0acb095b3ad0bca48f2ab00c87346665643f64f
 F src/parse.y 4285cd2d0f31a8db4c4d54325f88e500452fa029
 F src/pragma.c 4496cc77dc35824e1c978c3d1413b8a5a4c777d3
@@ -87,7 +87,7 @@ F src/update.c 14be4ba2f438919b4217085c02feff569e6cf1f2
 F src/utf.c 1199766bbb0157931a83aa6eede6b6381177be64
 F src/util.c 82ee598519b8193184bdeab06b51a4ffa05ad60b
 F src/vacuum.c 3865673cc66acd0717ecd517f6b8fdb2a5e7924b
-F src/vdbe.c bda7131d98f2a742f864f9bbbb5249f3c0c6b432
+F src/vdbe.c 799e6280aef25bae55d2da21b5a6dbdda5e76e36
 F src/vdbe.h 8729a4ee16ff9aeab2af9667df3cf300ff978e13
 F src/vdbeInt.h eb3f86ab08ef11635bc78eb88c3ff13f923c233b
 F src/vdbeapi.c dcb2636f49b4807e34960d52a2fc257b3a751140
@@ -172,7 +172,7 @@ F test/insert2.test 5a20e1ace5fa0800b58d28284212290189b49aed
 F test/insert3.test 0096bd9766f94f4fa06ef712658e590b782cb44f
 F test/interrupt.test cd24dc5bedd02325be4bfa5d6209fae01c465157
 F test/intpkey.test af4fd826c4784ec5c93b444de07adea0254d0d30
-F test/ioerr.test 35637957d7d5c6385bd94e8a6f067b5016219c03
+F test/ioerr.test 42581999ad54d5afe4d703550b1faf308e8cb53c
 F test/join.test db3802739fb695bdfa2e88805e3d64ec5ffbebd1
 F test/join2.test f2171c265e57ee298a27e57e7051d22962f9f324
 F test/join3.test 6f0c774ff1ba0489e6c88a3e77b9d3528fb4fda0
@@ -237,7 +237,7 @@ F test/table.test 6dc0dfa44dd429520e0e5a0c5e55025f730e9403
 F test/tableapi.test 6a66d58b37d46dc0f2b3c7d4bd2617d209399bd1
 F test/tclsqlite.test 96f5dbba15df0523e889b8d892f152c2f60b8efb
 F test/temptable.test c36f3e5a94507abb64f7ba23deeb4e1a8a8c3821
-F test/tester.tcl 0a939262ccb0b87449f98d8780396a4c293831b0
+F test/tester.tcl 66a4bfa61a05e08ea523ef077e7ad0eab090c327
 F test/thread1.test 776c9e459b75ba905193b351926ac4019b049f35
 F test/thread2.test 6d7b30102d600f51b4055ee3a5a19228799049fb
 F test/threadtest1.c 6029d9c5567db28e6dc908a0c63099c3ba6c383b
@@ -344,7 +344,7 @@ F www/tclsqlite.tcl bb0d1357328a42b1993d78573e587c6dcbc964b9
 F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
 F www/version3.tcl a99cf5f6d8bd4d5537584a2b342f0fb9fa601d8b
 F www/whentouse.tcl 97e2b5cd296f7d8057e11f44427dea8a4c2db513
-P 50964ef9b0159bfdcd7eae88b0806957cab184dc
-R fc67d17ec10c28fa4fe646ce8c0e9586
+P d86f18a4277ebffb644ba2e574e0b697c8bbf8e4
+R 7dfccdc93457a7fd816b98a21dcb1bda
 U danielk1977
-Z 38f8621f1508c75b5e0809f898b0dbd0
+Z aa3b02a91bab4996b62f927ed568dabe
diff --git a/manifest.uuid b/manifest.uuid
index 4de6e12ec8..84e0ee2e5c 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-d86f18a4277ebffb644ba2e574e0b697c8bbf8e4
\ No newline at end of file
+c30705a00d7d9d61fb9cb47a1019b1a186d690a7
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index b27d4f86dc..bbb2c05f4f 100644
--- a/src/main.c
+++ b/src/main.c
@@ -14,7 +14,7 @@
 ** other files are for internal use by SQLite and should not be
 ** accessed by users of the library.
 **
-** $Id: main.c,v 1.329 2006/01/19 17:42:51 drh Exp $
+** $Id: main.c,v 1.330 2006/01/24 13:09:33 danielk1977 Exp $
 */
 #include "sqliteInt.h"
 #include "os.h"
@@ -1088,23 +1088,21 @@ int sqlite3Corrupt(void){
 */
 int sqlite3_enable_shared_cache(int enable){
   ThreadData *pTd = sqlite3ThreadData();
-  if( !pTd ){
-    return SQLITE_NOMEM;
-  }
-  
-  /* It is only legal to call sqlite3_enable_shared_cache() when there
-  ** are no currently open b-trees that were opened by the calling thread.
-  ** This condition is only easy to detect if the shared-cache were 
-  ** previously enabled (and is being disabled). 
-  */
-  if( pTd->pBtree && !enable ){
-    assert( pTd->useSharedData );
-    return SQLITE_MISUSE;
-  }
+  if( pTd ){
+    /* It is only legal to call sqlite3_enable_shared_cache() when there
+    ** are no currently open b-trees that were opened by the calling thread.
+    ** This condition is only easy to detect if the shared-cache were 
+    ** previously enabled (and is being disabled). 
+    */
+    if( pTd->pBtree && !enable ){
+      assert( pTd->useSharedData );
+      return SQLITE_MISUSE;
+    }
 
-  pTd->useSharedData = enable;
-  sqlite3ReleaseThreadData();
-  return SQLITE_OK;
+    pTd->useSharedData = enable;
+    sqlite3ReleaseThreadData();
+  }
+  return sqlite3ApiExit(0, SQLITE_OK);
 }
 #endif
 
diff --git a/src/pager.c b/src/pager.c
index 9681ab5a1f..bd80b07c7a 100644
--- a/src/pager.c
+++ b/src/pager.c
@@ -18,7 +18,7 @@
 ** file simultaneously, or one process from reading the database while
 ** another is writing.
 **
-** @(#) $Id: pager.c,v 1.255 2006/01/24 12:09:19 danielk1977 Exp $
+** @(#) $Id: pager.c,v 1.256 2006/01/24 13:09:33 danielk1977 Exp $
 */
 #ifndef SQLITE_OMIT_DISKIO
 #include "sqliteInt.h"
@@ -1778,9 +1778,10 @@ void enable_simulated_io_errors(void){
 void sqlite3pager_read_fileheader(Pager *pPager, int N, unsigned char *pDest){
   memset(pDest, 0, N);
   if( MEMDB==0 ){
+    disable_simulated_io_errors();
     sqlite3OsSeek(pPager->fd, 0);
     sqlite3OsRead(pPager->fd, pDest, N);
-    clear_simulated_io_error();
+    enable_simulated_io_errors();
   }
 }
 
diff --git a/src/vdbe.c b/src/vdbe.c
index 8b08507364..090fff3814 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -43,7 +43,7 @@
 ** in this file for details.  If in doubt, do not deviate from existing
 ** commenting and indentation practices when changing or adding code.
 **
-** $Id: vdbe.c,v 1.538 2006/01/24 12:09:20 danielk1977 Exp $
+** $Id: vdbe.c,v 1.539 2006/01/24 13:09:33 danielk1977 Exp $
 */
 #include "sqliteInt.h"
 #include "os.h"
@@ -2971,7 +2971,7 @@ case OP_IsUnique: {        /* no-push */
   assert( pCx!=0 );
   pCrsr = pCx->pCursor;
   if( pCrsr!=0 ){
-    int res, rc;
+    int res;
     i64 v;         /* The record number on the P1 entry that matches K */
     char *zKey;    /* The value of K */
     int nKey;      /* Number of bytes in K */
diff --git a/test/ioerr.test b/test/ioerr.test
index e96dfd4a5b..47a1dadd6b 100644
--- a/test/ioerr.test
+++ b/test/ioerr.test
@@ -15,7 +15,7 @@
 # The tests in this file use special facilities that are only
 # available in the SQLite test fixture.
 #
-# $Id: ioerr.test,v 1.24 2006/01/23 16:25:22 drh Exp $
+# $Id: ioerr.test,v 1.25 2006/01/24 13:09:33 danielk1977 Exp $
 
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
@@ -44,7 +44,7 @@ do_ioerr_test ioerr-1 -sqlprep {
   COMMIT;
   SELECT * FROM t1;
   DELETE FROM t1 WHERE a<100;
-} -exclude [expr [string match [execsql {pragma auto_vacuum}] 1] ? 8 : 0]
+} -exclude [expr [string match [execsql {pragma auto_vacuum}] 1] ? 4 : 0]
 
 # Test for IO errors during a VACUUM. 
 #
@@ -75,7 +75,7 @@ ifcapable vacuum {
   } -sqlbody {
     VACUUM;
   } -exclude [list \
-      1 [expr [string match [execsql {pragma auto_vacuum}] 1]?12:-1]]
+      1 [expr [string match [execsql {pragma auto_vacuum}] 1]?9:-1]]
 }
 
 do_ioerr_test ioerr-3 -tclprep {
@@ -120,7 +120,7 @@ do_ioerr_test ioerr-4 -tclprep {
 # reason as in test cases ioerr-1.XXX
 set ex ""
 if {[string match [execsql {pragma auto_vacuum}] 1]} {
-  set ex [list 8 17]
+  set ex [list 4 17]
 }
 do_ioerr_test ioerr-5 -sqlprep {
   ATTACH 'test2.db' AS test2;
diff --git a/test/tester.tcl b/test/tester.tcl
index 8e63d6bcd4..2a96704416 100644
--- a/test/tester.tcl
+++ b/test/tester.tcl
@@ -11,7 +11,7 @@
 # This file implements some common TCL routines used for regression
 # testing the SQLite library
 #
-# $Id: tester.tcl,v 1.63 2006/01/21 12:08:55 danielk1977 Exp $
+# $Id: tester.tcl,v 1.64 2006/01/24 13:09:33 danielk1977 Exp $
 
 # Make sure tclsqlite3 was compiled correctly.  Abort now with an
 # error message if not.
@@ -382,9 +382,10 @@ proc do_ioerr_test {testname args} {
       set r [catch $::ioerrorbody msg]
       set ::go [expr {$::sqlite_io_error_pending<=0}]
       set s [expr $::sqlite_io_error_hit==0]
+      set ::sqlite_io_error_hit 0
       # puts "$::sqlite_io_error_pending $r $msg"
-      # puts "r=$r s=$s msg=\"$msg\""
-      expr { ($s && !$r) || (!$s && $r) }
+      # puts "r=$r s=$s go=$::go msg=\"$msg\""
+      expr { ($s && !$r && !$::go) || (!$s && $r && $::go) }
       # expr {$::sqlite_io_error_pending>0 || $r!=0}
     } {1}