diff --git a/manifest b/manifest
index 00270d752f..b02895edbc 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Remove\sthe\sP3\soperand\sfrom\sOP_IsNull\ssince\sit\swas\snot\sbeing\sused.\s(CVS\s6779)
-D 2009-06-18T00:41:56
+C Reduce\sthe\sminimum\susable\spage\sspace\sto\s480\sbyte\sfrom\s500\sbytes.\s(CVS\s6780)
+D 2009-06-18T11:29:21
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 8b8fb7823264331210cddf103831816c286ba446
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -106,7 +106,7 @@ F src/auth.c 98db07c2088455797678eb1031f42d4d94d18a71
 F src/backup.c ff50af53184a5fd7bdee4d620b5dabef74717c79
 F src/bitvec.c 0ef0651714728055d43de7a4cdd95e703fac0119
 F src/btmutex.c 9b899c0d8df3bd68f527b0afe03088321b696d3c
-F src/btree.c c7fc867f52fbe5fc729aa56ce0a48c2645def82e
+F src/btree.c 067ad47d83912806c4ca6dff16eda544d3dc3952
 F src/btree.h f70b694e8c163227369a66863b01fbff9009f323
 F src/btreeInt.h 122021a7d70633b389c447d9a05f9242f410809d
 F src/build.c 75b57e3f4de1b34d4e1e49d350dc87febff48ba0
@@ -736,7 +736,7 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl 672f81d693a03f80f5ae60bfefacd8a349e76746
-P 0def0b76b9f4de9ee259ab1cbe71051fd58b73be
-R 1322e72b4dc9de9db623061ba46b85c0
+P 767ef1e4a1b31abef479368d9f960ecfd6fa08c6
+R 8744c9794ddcaab9cd3a95677140b542
 U drh
-Z 6c3325c9dd99964c6cb9177724f1f76f
+Z e3c683c6fe4544dec2a7e820e22e1cce
diff --git a/manifest.uuid b/manifest.uuid
index 7613d20d98..1edb2592cb 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-767ef1e4a1b31abef479368d9f960ecfd6fa08c6
\ No newline at end of file
+db4fb835363c9c7e38c891e01188a6e2db88472d
\ No newline at end of file
diff --git a/src/btree.c b/src/btree.c
index b02cd4c89c..8d6a1482d6 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -9,7 +9,7 @@
 **    May you share freely, never taking more than you give.
 **
 *************************************************************************
-** $Id: btree.c,v 1.634 2009/06/17 13:57:16 drh Exp $
+** $Id: btree.c,v 1.635 2009/06/18 11:29:21 drh Exp $
 **
 ** This file implements a external (disk-based) database using BTrees.
 ** See the header comment on "btreeInt.h" for additional information.
@@ -2040,7 +2040,7 @@ static int lockBtree(BtShared *pBt){
       if( rc ) goto page1_init_failed;
       return SQLITE_OK;
     }
-    if( usableSize<500 ){
+    if( usableSize<480 ){
       goto page1_init_failed;
     }
     pBt->pageSize = (u16)pageSize;