This is a duplicate bug of 364. I attached everything to bug 364. Sorry for this mess, I can attach the comments and other such things if need be to this one. I have left: configs, level 10 winbind logs and example of problem appearance. This is critical, as it stops anyone from connecting or using this machine. The authentication just hangs... it never comes back until you restart winbind.
please retest against 3.0.11
sorry for the same, cleaning up the database to prevent unecessary reopens of bugs.