using PHP beta 4 (not available to select in http://bugs.php.net/version4/), mysql, myodbc and apache 1.3.9 and the php.ini-dist as php.ini.
On any database access PHP crashes:

PHP [aroused an error by invalid page access] verursachte einen Fehler durch eine ung?ltige Seite
in Modul KERNEL32.DLL bei 0167:bff7b992.
Register:
EAX=00000004 CS=0167 EIP=bff7b992 EFLGS=00010246
EBX=00000000 SS=016f ESP=0063fc38 EBP=0063fc64
ECX=00e6fccc DS=016f ESI=00000004 FS=4faf
EDX=007779b0 ES=016f EDI=00d70b20 GS=0000
Bytes bei CS:EIP:
80 3e 04 74 0f 33 c0 50 50 50 68 05 00 00 c0 e8 
Stapelwerte: [stack values]
00000000 1f49103b 00000004 00d70af4 1f492819 00d70b20 00d70000 00787240 00787200 00000000 00000000 00000003 1f49267d 00d70af4 00000001 00000010 

apache just says an http500

Internal Server Error
The server encountered an internal error or ...

simple php3-files like <? echo "hello world" ?> are interpreted correctly. i couldn't send an gdb backtrace either because the page http://bugs.php.net/version4/bugs-generating-backtrace.php3 does not exist.