Did you install the 13.0.1 update?
Yes. I did that after the first time it happened and then it happened again. Here is my system info:
Adobe Photoshop Version: 13.0.1 (13.0.1 20120808.r.519 2012/08/08:21:00:00) x64
Operating System: Windows 7 64-bit
Version: 6.1 Service Pack 1
System architecture: Intel CPU Family:6, Model:10, Stepping:5 with MMX, SSE Integer, SSE FP, SSE2, SSE3, SSE4.1, SSE4.2, HyperThreading
Physical processor count: 4
Logical processor count: 8
Processor speed: 3073 MHz
Built-in memory: 12279 MB
Free memory: 6264 MB
Memory available to Photoshop: 10996 MB
Memory used by Photoshop: 60 %
Image tile size: 128K
Image cache levels: 4
OpenGL Drawing: Enabled.
OpenGL Drawing Mode: Advanced
OpenGL Allow Normal Mode: True.
OpenGL Allow Advanced Mode: True.
OpenGL Allow Old GPUs: Not Detected.
Video Card Vendor: ATI Technologies Inc.
Video Card Renderer: AMD Radeon HD 6800 Series
I am having the same problem, did you discover the answer?