Hi, I had the same problem here, due to a ever growing number of vhosts. I had a look at lsof and I saw that logging directives inside each vhost caused the number of open files to explode. I've removed some of them and I should be ok again for a year (1200 -> 800 open files), or till an upgrade to apache2. Anyone knows if apache2 has the same problem?
-- Groetjes, Mathieu