I was getting reports of "500 Internal Server Errors" on two of my web servers. And after further investigation it looks like it was related to the following error.

(4)Interrupted system call: FastCGI: comm with server "php-fastcgi.fcgi" aborted: select() failed

After doing some reasearch I stumbled upon the following patch.

http://groups.google.com/group/linux.debian.bugs.dist/browse_thread/thread/3de22bc415d3da02?pli=1