regarding audio/video synch problems.... i have no clue. i did not see this ever with any rendition of the trainer. in fact, this is so unusual i don't have any idea where to even begin looking for this problem. how or why the trainer by itself would cause this seems very very unlikely. i doubt the trainer is the culprit.
Not problem with the upgrades but Option (numpad) 8 for buildings can (and has) crashed the game for me if you don't follow Cal's instructions on page one to the letter. I was a bit too quick with a second click before my builder got there and back to desktop I went. Just wondering if you'd done the same thing Raven?