Alex: Sonar X3D, UAD 7.4, Win7 Home Premium with SP1.
Craig: You would be correct Sir. The older versions worked fine for me. The newer ones after 6.4 were jacked in Sonar for me. The only reason I updated to them was I bought the new plugins that came with the newer versions. So if you ever take the plunge for the newer stuff, you'll be forced to update your UAD software and will need to reconfigure a few things. They no longer give you folder choices, they install loads of mono plugs, you will have to rename/relist any custom plug menu's....it's actually pretty gross...especially if you have both 32 and 64 bit plugs installed.
Brian: Still no issues on my end even in x64. The only thing I'm experiencing is what Mel and others reported with fx chains in PC. I can do fx chains in the regular track and bus fx bins with no issues. I decided to try one of my older machines that has a Duo in it. I'm running a project with 21 UAD's using both your methods and mine and everything is working flawlessly. I wish I could figure out why it's working on my end and not yours. Sorry man....on the bright side, Noel checked in...and if he says he has a fix for it, have no fear for the great Noel is here. :)
-Danny