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.