I have persistent, ongoing problems with CS4 64-bit version (the system is unstable - cursor jumps around -- functions don't work) and I can't get a response from Adobe support. These guys are so arrogant. If there was a real alternative program, I'd buy it in a heartbeat.
I'm sorry to hear about the rash of issues you have encountered. While I can't help with the Adobe Support issue I can try to help in figuring out the problem you're having with Photoshop. Can you tell me more about the computer you're seeing the problems with? OS, RAM, HD, 3rd-party plugins installed: anything you're able to detail will help in nailing the problem down.