I can reproduce this insofar as I get the error message in the logfile. It happens also whithout php. However, my apache continues to work afterwards.
This might be related to https://issues.apache.org/bugzilla/show_bug.cgi?id=37680 which is fixed in 2.2.4. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]