Since installing AppTapp on my phone in Vista, iTunes crashes every time with the iPhone plugged in. Whatever it was that AppTapp did (it installs some sort of device drivers?) has corrupted my mobile device support. Reinstalling iTunes has not helped either, and sync is disabled in iTunes.
This occurs with both my unlocked/jailbroken/AppTapp iPhone as well as my friends brand new iPhone. However, they both work fine in the Mac iTunes.