diff -ru x264-snapshot-20080226-2245/configure x264-snapshot-20080226-2245+iPhone/configure
--- x264-snapshot-20080226-2245/configure	2008-02-26 21:45:02.000000000 +0000
+++ x264-snapshot-20080226-2245+iPhone/configure	2008-02-27 08:09:51.000000000 +0000
@@ -407,7 +407,7 @@
 if [ "$debug" = "yes" ]; then
     CFLAGS="-O1 -g $CFLAGS"
 else
-    CFLAGS="-O4 -ffast-math $CFLAGS"
+    CFLAGS="-O3 -ffast-math $CFLAGS"
 fi
 
 if cc_check "stdio.h" "" "fseeko(stdin,0,0);" ; then