EA has released an svn version that is supposed to be compatible with PHP 5.3. We tried testing it the other day, and it seemed to work great on our main sites. But then, one of our clients notified us that their site wasn't accessible, he was getting 503 errors. So we checked, and every site that we added using the PHP_suexec VH template wasn't working. We checked the logs and LSWS wasn't creating the php .sock files in the /tmp directory for each VH. So that tells me that PHP won't load with eA module enabled, but just for those particular sites.
It's weird because it works for the two main sites that use their own external app configurations.
So we had to remove eA and put back XCache and things are running smoothly again.
Not sure why eA won't start and causes PHP not to load on the other VH's. Any ideas?