I had problems with this once i connected 4 machines to it (6 total miners).

Tried it soloing and on bitparking and while I slept and found that I wasn't getting what I was supposed to.

turned off both namecoin options and was hitting slush and deepbit and getting about 2/3 of the shares I should have

connections to the proxy started timing out, so restarting apache fixed it, but i didn't trust it enough to keep going

This was on a VM w/ 1GB of ram

What kind of hardware are you guys running on?