Funny enough, I've been getting it for the last couple of days on my Mac Pro (200

since upgrading my TI1 Desktop to OS4 - using Logic 8.02, 10.5.8. If I open a blank template and load the VC, I get to play about 3-4 notes on my midi controller and then that's it. No more sound. I end up closing Logic and power cycling the Virus to get anywhere.
The TI screen shows on the top right the left arrow which is flashing constantly and if I go into the VC and hit any midi keys, the graphical bar moves as per normal.
Getting quite annoyed so I might downgrade to the previous version just to see how it goes.