FATAL ERROR Can't send () int to the server

is what I get when starting MOC.
I tried reinstalling with Synaptic but it doesn't help.

on Xubuntu 10.04

googling I came on a Polish discussion with the same problem. With google translate I found out what they were saying: delete the cache folder ~/.moc/cache

Resolved by SVN r2492: Use process heap memory for Berkeley DB storage.
Also see: http://moc.daper.net/node/846