just installed the 7.500 Up2date. After the reboot I received lots of mails via POP3 proxy that were previously quarantined as spam.
Additionally I got several mails like this one (which I never have seen before):

The POP3 proxy log contains the following two error entries:
2009:09:18-17:57:16 astaro1 pop3proxy[4213]: Prefetch: Can't get account_info for account 1
2009:09:18-17:57:16 astaro1 pop3proxy[4213]: Prefetcher exception
Regards,
Bastian