I don't use a zeitcoin.conf anymore, but before when I had a zeitcoin.conf I had the same issues. I removed the conf because of most nodes were obsolete.
Maybe I need to rebuild the wallet again. Because of the message on the zeitcoin forum, I thought it was a general issue.
Maybe it's because my wallet runs on the crappy windows 8 :-p, but on other wallets I never had that problem.