Hi J
I don't know much about your computer... are you Tiger 7.4 or Leo 7.4.2.
Regardless my advise and many other of this Conference is to always have a backup plan; that is a fresh HD, fresh Leo install on that HD and fresh PT install. Test each plugin after loading so you know any problems. I keep copies of the Plug downloads on a seperate drive to rebuild and archive.
Lots of work but I have been using this practice since Mix to HD and I have never had a bad install or problems. Always stay compliant with Digi and problems are few.
The Channel Matrix issue is my first big problem and Digi called me Friday and will be testing next week in their lab.
I generally run dual HD's until Digi works out all bugs, I am currently running PT7.4 and PT8. This has saved me on this issue as loss of channel matrix is big for PC
Keep me posted
Good luck,
M