I just wanted to report this and see if there's any tips. I just updated everything (VEP, VIP, MIR Pro & the Suite) and have a very obvious decrease in performance. I just opened a project I finished last week to test it out and have crackling and stuttering when lots of Vienna instruments are playing. This played without a hitch last week but with the latest software updates can't make it through the big tuttis. I've restarted both my machines and repaired permissions on the Mac. No other changes have been made.
Host is Mac Pro OS 10.6.8 and is running Digital Performer 8, a couple of live guitar channels with GuitarRig 5, 1 instance of Omnisphere with just a couple channels in use, and 1 instance of Play with just one channel in use. Slave is Dual Xeon Windows 7 and is running 1 instance of VEP-64 using a variant on Herb's Teldex big orchestra setup (so full orchestra on 5 Event Inputs) and 1 instance of VEP-32 with a drum kit in GVI.
Any suggestions are appreciated, but mainly I just wanted to report this in hopes that there's a "whoops, we'll fix that next time!"