diff --git a/manifest b/manifest
index 4ac8e8da69..30e98bd3bb 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Fix\sa\spage\sleak\sin\sbtree\sbalance\sroutines\sthat\sfollows\sa\smalloc\sfailure.\nThis\sproblem\sdetected\sby\sthe\snew\ssoft-heap-limit\stesting.\s(CVS\s4214)
-D 2007-08-13T14:56:44
+C Disable\stests\sthat\srequire\s80-bit\slong\sdoubles\swhen\sthe\shost\sonly\nprovides\s64-bit\slong\sdoubles.\s\sTicket\s#2570.\s(CVS\s4215)
+D 2007-08-13T15:18:28
 F Makefile.in 0c0e53720f658c7a551046442dd7afba0b72bfbe
 F Makefile.linux-gcc 65241babba6faf1152bf86574477baab19190499
 F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
@@ -127,7 +127,7 @@ F src/test9.c c0f38f7795cc51d37db6c63874d90f40f10d0f0e
 F src/test_async.c 9d326ceda4306bcab252b8f7e8e480ed45d7ccb6
 F src/test_autoext.c 855157d97aa28cf84233847548bfacda21807436
 F src/test_btree.c 882d59acad48bab3b1fe3daf3645059b590cfc79
-F src/test_config.c 4d262b9f27b616dea481a40d57a95ab0ab27f878
+F src/test_config.c 26389b032216e0fb2b544ff48a5e9101bd7b1fb4
 F src/test_hexio.c 14c007252285c6dabcec4a28fcf08e9177e85178
 F src/test_loadext.c 22065d601a18878e5542191001f0eaa5d77c0ed8
 F src/test_md5.c d9f828765b242ff86f58cd879259c3da4eaede02
@@ -193,7 +193,7 @@ F test/capi2.test 7ecc9b342cc9ec27b53bbf95724cf2e5874fd496
 F test/capi3.test f4e77c300d870653f9fc1b20bef6788f0790b3f1
 F test/capi3b.test 664eb55318132f292f2c436f90906f578cad6b97
 F test/capi3c.test 76a3fb94755288a2977ee387e95305e6224c0198
-F test/cast.test 0302bbc8d1be2f94da1e16ad2eb01ea356e26d18
+F test/cast.test c4780b58b569bab4947458195410ae8791ac216b
 F test/check.test 024ed399600b799160378cf9d9f436bdf5dfd184
 F test/collate1.test e3eaa48c21e150814be1a7b852d2a8af24458d04
 F test/collate2.test 701d9651c5707024fd86a20649af9ea55e2c0eb8
@@ -525,7 +525,7 @@ F www/tclsqlite.tcl 8be95ee6dba05eabcd27a9d91331c803f2ce2130
 F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
 F www/version3.tcl 890248cf7b70e60c383b0e84d77d5132b3ead42b
 F www/whentouse.tcl fc46eae081251c3c181bd79c5faef8195d7991a5
-P 540a7b28bc37709056cfdb13286274ec5bdd8423
-R afb921f147a22c593ebfd95c9b9c9329
+P bad661bb0bfabf982a2d711ea4165af130a4cae0
+R 87672e336cfbb4317cdd497fbb7beb13
 U drh
-Z 9c5ddd19c39d343909cd79d4e93a06b7
+Z beb749948d241b4e02e20c8b85c1b5e8
diff --git a/manifest.uuid b/manifest.uuid
index 38a127bb01..7358c93a3b 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-bad661bb0bfabf982a2d711ea4165af130a4cae0
\ No newline at end of file
+4f4f8ef416394b7e54e8894f7a0d067d64636fc4
\ No newline at end of file
diff --git a/src/test_config.c b/src/test_config.c
index 8a2e3f72c5..f8312e435e 100644
--- a/src/test_config.c
+++ b/src/test_config.c
@@ -16,7 +16,7 @@
 ** The focus of this file is providing the TCL testing layer
 ** access to compile-time constants.
 **
-** $Id: test_config.c,v 1.6 2007/06/07 10:55:36 drh Exp $
+** $Id: test_config.c,v 1.7 2007/08/13 15:18:28 drh Exp $
 */
 #include "sqliteInt.h"
 #include "tcl.h"
@@ -239,6 +239,10 @@ static void set_options(Tcl_Interp *interp){
   Tcl_SetVar2(interp, "sqlite_options", "load_ext", "1", TCL_GLOBAL_ONLY);
 #endif
 
+Tcl_SetVar2(interp, "sqlite_options", "long_double",
+              sizeof(LONGDOUBLE_TYPE)>sizeof(double) ? "1" : "0",
+              TCL_GLOBAL_ONLY);
+
 #ifdef SQLITE_OMIT_MEMORYDB
   Tcl_SetVar2(interp, "sqlite_options", "memorydb", "0", TCL_GLOBAL_ONLY);
 #else
diff --git a/test/cast.test b/test/cast.test
index 820663eca6..fc0f74b70b 100644
--- a/test/cast.test
+++ b/test/cast.test
@@ -11,7 +11,7 @@
 # This file implements regression tests for SQLite library.  The
 # focus of this file is testing the CAST operator.
 #
-# $Id: cast.test,v 1.7 2007/05/17 16:34:45 danielk1977 Exp $
+# $Id: cast.test,v 1.8 2007/08/13 15:18:28 drh Exp $
 
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
@@ -229,9 +229,11 @@ do_test cast-3.12 {
 do_test cast-3.13 {
   execsql {SELECT CAST('9223372036854774800' AS real)}
 } 9.22337203685477e+18
-do_test cast-3.14 {
-  execsql {SELECT CAST(CAST('9223372036854774800' AS real) AS integer)}
-} 9223372036854774784
+ifcapable long_double {
+  do_test cast-3.14 {
+    execsql {SELECT CAST(CAST('9223372036854774800' AS real) AS integer)}
+  } 9223372036854774784
+}
 do_test cast-3.15 {
   execsql {SELECT CAST('-9223372036854774800' AS integer)}
 } -9223372036854774800
@@ -241,9 +243,11 @@ do_test cast-3.16 {
 do_test cast-3.17 {
   execsql {SELECT CAST('-9223372036854774800' AS real)}
 } -9.22337203685477e+18
-do_test cast-3.18 {
-  execsql {SELECT CAST(CAST('-9223372036854774800' AS real) AS integer)}
-} -9223372036854774784
+ifcapable long_double {
+  do_test cast-3.18 {
+    execsql {SELECT CAST(CAST('-9223372036854774800' AS real) AS integer)}
+  } -9223372036854774784
+}
 if {[db eval {PRAGMA encoding}]=="UTF-8"} {
   do_test cast-3.21 {
     execsql {SELECT CAST(x'39323233333732303336383534373734383030' AS integer)}
@@ -254,9 +258,14 @@ if {[db eval {PRAGMA encoding}]=="UTF-8"} {
   do_test cast-3.23 {
     execsql {SELECT CAST(x'39323233333732303336383534373734383030' AS real)}
   } 9.22337203685477e+18
-  do_test cast-3.24 {
-    execsql {SELECT CAST(CAST(x'39323233333732303336383534373734383030' AS real) AS integer)}
-  } 9223372036854774784
+  ifcapable long_double {
+    do_test cast-3.24 {
+      execsql {
+        SELECT CAST(CAST(x'39323233333732303336383534373734383030' AS real)
+                    AS integer)
+      }
+    } 9223372036854774784
+  }
 }
 do_test case-3.31 {
   execsql {SELECT CAST(NULL AS numeric)}