Nobody can know. You have not provided any system info and otehr technical details. And asking for phone support is pointless. Even if it was available, only current versions would be supported. It has never been any different. You will have to make do with asking questions on this forum or scouring the Internet.
Sorry, I didn't know if it was a known or common issue or not. Okay, what specific information do I need to include besides the following?
OS: Windows 7 home premium
16 GB RAM
Intel core i5 2320 @ 3ghz
3x 1tb HD (C: 30% free F: 55% free G: 20% free)
NVidia GeForce GTX 550 ti
Photoshop CS3 Extended 10.0
First you need to at least update photoshop cs3 to 10.0.1 and any other cs3 updates you might need from here:
Then i would reset the photoshop cs3 preferences.
Press and hold down the Shift+Ctrl+Alt keys just after starting the launch of photoshop cs3
Keep holding the keys down until you get a dialog asking if you want to delete the adobe photoshop settings file