After upgrade to MS 4.74 mails are stuck in queue.

[memmas]

I'm using slackware 12.2
postfix 2.5.5
ClamAV 0.94.2
Spamassassin 3.2.5

after upgrade to 4.74 (same applies to beta) I get a loop in mail log 
and nothing happening, mail are stuck in queue.

Jan  7 16:03:47 devel MailScanner[22474]: MailScanner E-Mail Virus 
Scanner version 4.74.13 starting...
Jan  7 16:03:47 devel MailScanner[22474]: Read 848 hostnames from the 
phishing whitelist
Jan  7 16:03:47 devel MailScanner[22474]: Read 3820 hostnames from the 
phishing blacklist
Jan  7 16:03:47 devel MailScanner[22474]: Using SpamAssassin results cache
Jan  7 16:03:47 devel MailScanner[22474]: Connected to SpamAssassin 
cache database
Jan  7 16:03:47 devel MailScanner[22474]: Enabling SpamAssassin 
auto-whitelist functionality...
Jan  7 16:03:49 devel MailScanner[22474]: I have found clamav scanners 
installed, and will use them all by default.
Jan  7 16:03:49 devel MailScanner[22474]: Using locktype = flock
Jan  7 16:03:52 devel MailScanner[22530]: MailScanner E-Mail Virus 
Scanner version 4.74.13 starting...
Jan  7 16:03:52 devel MailScanner[22530]: Read 848 hostnames from the 
phishing whitelist
Jan  7 16:03:52 devel MailScanner[22530]: Read 3820 hostnames from the 
phishing blacklist
Jan  7 16:03:52 devel MailScanner[22530]: Using SpamAssassin results cache
Jan  7 16:03:52 devel MailScanner[22530]: Connected to SpamAssassin 
cache database
Jan  7 16:03:52 devel MailScanner[22530]: Enabling SpamAssassin 
auto-whitelist functionality...
Jan  7 16:03:54 devel MailScanner[22530]: I have found clamav scanners 
installed, and will use them all by default.
Jan  7 16:03:54 devel MailScanner[22530]: Using locktype = flock
Jan  7 16:03:57 devel MailScanner[22586]: MailScanner E-Mail Virus 
Scanner version 4.74.13 starting...
Jan  7 16:03:57 devel MailScanner[22586]: Read 848 hostnames from the 
phishing whitelist
Jan  7 16:03:57 devel MailScanner[22586]: Read 3820 hostnames from the 
phishing blacklist
Jan  7 16:03:57 devel MailScanner[22586]: Using SpamAssassin results cache
Jan  7 16:03:57 devel MailScanner[22586]: Connected to SpamAssassin 
cache database
Jan  7 16:03:57 devel MailScanner[22586]: Enabling SpamAssassin 
auto-whitelist functionality...
Jan  7 16:03:59 devel MailScanner[22586]: I have found clamav scanners 
installed, and will use them all by default.
Jan  7 16:03:59 devel MailScanner[22586]: Using locktype = flock

thanks