Version, OS, …?
Does turning off »Use Graphics Processor« in the Performance Preferences and restarting Photoshop have any bearing on the issue?
I have tried turning off and restarting, I currently use PS CC but this problems also was a problem for me in PS5.
Please answer all questions you have been asked and provide all pertinent details if you want help.
Please read this FAQ for advice on how to ask your questions correctly for quicker and better answers: