CL acquisition hangs when image gets too bright?

I'm having a bit of a strange problem and I can't be sure whether it's the camera or the board: basically, in any run mode, when the image gets too bright, the aquisition stops and I get a timeout in MAX.This is with a PCIe-1433 and a Point Grey Gazelle. Capping the camera and restarting the acquistion works fine. This happens any time the majority of the image gets to ~80% brightness.
Making things more confusing, this can sometimes be fixed by switching cables (the same model 5 meter NI cable, but just a different one); now, however, I have a couple of cameras that exhibit this with any cable and so I need to get it figured out. It certainly might be a camera issue or some combination and so I'm contacting PGR as well. Anybody have any thoughts on this? Thanks in advance for any info!
Solved!
Go to Solution.

Thanks for the replies so far.
* If the brightness is overdriven with EITHER gain OR exposure OR aperture OR by shining a light in the camera, it can happen. 
* It seems that choosing different cables or a different camera can change the amount of overdrive required to do this, but it can always be forced.
* If I clip the acquisition window and overdrive outside the window, still happens. If I clip the ROI on-camera and overdrive outside that, does not happen.
* Strangely, in the NI camera file generator, a "Snap" will always succeed, no matter how bright. The "Grab" will fail with a timeout if the image starts too bright.
* Bit of a breakthrough. The gradient test pattern (which contains 16384 of each grey level) works fine no matter what I do with the physical camera. The pseudo-random pattern (Snap attached) causes this failure. 
* In 2-tap mode (which is a no go for frame rate, but I checked for troubleshooting) I can see the pseudorandom pattern with no problems, but overdrive still causes the initial issue.
Unless there's something really weird happening, this makes me think that the problem, such as it is, lies with the board. Something to do with how it is detecting blanking, or the end of the frame, is being fooled by the pattern? 
Thanks so much for the test pattern tip, BlueCheese, I still down have a fix but I know where to direct my attention now.
Attachments:
psuedo.png ‏281 KB

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