apache segfaults following script execution

Hi, I'm having a strange problem that I hope some of you can answer... I've been writing an extension which I use (obviously :-) The problem is that after the script is executed (in it's entirety - even PHP_RSHUTDOWN_FUNCTION is executed) apache segfaults... I used gdb and started apache in "single-thread" mode (using -X) - and this is what I get: --- output starts here --- (gdb) run Starting program: /usr/sbin/httpd -X Program received signal SIGSEGV, Segmentation fault. 0x400ed431 in _IO_vfprintf (s=0xbffff47c, format=0x4086cc80 "%s(%d) : Actual location (location was relayed)\n", ap=0xbffff590) at vfprintf.c:1259 1259 vfprintf.c: No such file or directory. --- output ends here --- I'm in no way blind to the fact that this probably has something to do with my extension, but exactly how has eluded me for some time Thanks Thomas