My brother and I are playing through simultaneously on our respective computers:
Computer 1
Windows 2000 Pro SP4
Athlon 1.4GHz
512MB RAM
GeForce3 64MB
FF7 1.02 NVIDIA TNT w/ QFixApp 1.5 Win2000 Layer (NO HIGH-RES PATCH)
Computer 2 (laptop)
Windows XP Pro SP2
Centrino 1.86GHz
1GB RAM
GeForce6800Go 256MB
FF7 1.02 NVIDIA TNT w/ High-Res Patch
Both setups seemed relatively stable up to Mt. Nibel. Computer 1 was rock solid, while Computer 2 crashed only every so often ONLY right when entering battles. That is, until we got to Mt. Nibel. Right after the bridge breaks and dumps Cloud and crew to a screen down below. I swear to God, BOTH computers seemed to lock up at the exact same field spots when entering random battles. TWICE! I know it doesn't seem logical. They are supposed to be RANDOM battles, after all. But it happened. We resorted to simply trying to run through the mountain and cave to the reactor as quickly as possible without getting attacked. Needless to say, that was impossible. But we eventually got lucky and got into battles without crashing.
All seemed well until the Mythril Mine. I exited the mine, and then proceeded to the nearest patch of forest to look for Yuffie. Just managed to make it into the trees until... random battle crash. I decided to try the same thing on Computer 1. Exited the Mithril Mine, ran toward the same trees, boom. Crash.
After that, though, I could not get the crash to repeat on either computer. Maybe it's all just a bizzare coincidence. The Mt. Nibel situation was a lot more crash happy on both computers. Now, both computers seem to suffer the occassional random battle crash. The crashes are always right at the start of a random battle before the battle swirl.
Also, on Computer 2 the movies run somewhat choppy. I have tried the upside-down patch to no avail. They run very smoothly on Computer 1. Any ideas?
Edit: I've tried all different types of things with QFixApp (Different layers, different fixes ticked, etc.), but I can't seem to get rid of the random crashes.