PL 6.1 Problems with Sends, Mutes, etc.

I recently upgraded to 6.1 (WinXP, 001). Since then, I have encountered these problems. First, sends and mutes will crap out after working with a session for a short period of time. This has been driving me crazy for the past 2 hours. I have to restart PT to get them to work. Also, I'm using an Octopre for drums. I am now getting pops every few seconds on all Octopre tracks. These are new problems since I have upgraded. Any thoughts will be appreciated.

I haven't had any trouble (yet?) with sends and mutes. Do you have the octopre sync'ed properly with PTLE?

I did prior to upgrading to 6.1. I haven't checked it out though. I'm away from the studio right now so I'll check it tomorrow. Thanks