Is anyone else having major trouble with the latest Update? Installed the latest version and trying mix a project and every other command, i.e. track routing, insert fx or simply pressing the play button is crashing SONAR. Frustrated beyond comprehension!!! Ready to switch DAW!!!

Working great here, just finished a 6 hour session with no crashes...

Working fine here too. Something unique to your system I would think. Any recent changes apart from the Sonar update? Is this with a new project or an pre-existing one? What plugins, etc?

5 hours today, 6 hours yesterday. One Rapture Pro freeze...then again I'm creating an expansion pack, so I'm pushing it hard.

Using UAD Plug-ins with Apollo Firewire interface and Firewire Satelite. Not a lot of plug-ins (maybe 6-8 per song) but SONAR is crashing like a test dummy over here. Crashes during playback while inserting plug-ins, crashes when I press play, crashes when re-routing vocal tracks to different busses, both during playback and stop. Any suggestions and highly welcomed!!!

What version UAD software, and which version of Windows?

working fine here...probably 12-16 hours all weekend... have you rolled back? It's painless and only takes a minute...I had one instance where I was encountering problems a couple months ago, rolled back, problem went away, redid the update and everything was fine...

I'm using UAD Software Version 8.4.
I haven't tried rolling back yet. maybe I'll give that a try and see what happens. (Thanks for the suggestion!!!)

One thing I have done is increased the recommended UAD bandwidth Allocation as recommended in the UAD Software manual. I'll test that out as well.

btw, I like your sig,  "Never look down on anyone UNLESS you're picking them up!" 
I forget this at times... great reminder!