Has anyone seen this in their error logs? Any ideas on what's causing it? I've checked the logs and there was but a single, run-of-the-mill request at that time, with one more a few seconds later. So despite what it says, I can't believe that my account was over its resource limit.
[Sat Mar 31 10:51:06 2012] [error] [client xx.xx.xx.xx] (11)Resource temporarily unavailable: couldn't create child process: 11: php53.cgi, referer: http://example.com/blah/blah