I also have the same problem when php 5.4 and php-apc is activated. Problem is very easy to reproduce: load any page in a browser. Hit (control) F5 to force a page reload. The connection sends the page to the browser, then segfault, causing an additional 1.0 second delay for all next GET (images...). It seems to be related with Keepalive.
De-activating php-apc made the problem disappear. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org