3.1 SP1 Issue

Hello there. I just upgraded the the just released SP1 for 3.1. Using Firefox which so far the Emptying Trash and SPAM folder bug is fixed (Thanks guys!), but now when I select several messages (around 80 in this case) the VO workspace locks up after putting the messages in the Trash folder. The only thing I have been able to do is close the browser and reopen it and all is well again. When I get a bunch of messages that can be deleted I'll give it another try. I was just curious if anyone else has noticed this? If it doesn't happen again I'll post, but just thought it was a weird happening.