Like coze says...
...also the BVision is a hot little card - esp the GPU. Some of the corruption could be interpreted as overheating.
Having earthed yourself have a feel of your BVision's GPU & RAM while you're running one of these demos - expect it to be quite warn, but not really hot.
If so, I'd strongly recommend getting some heat-sinks for the RAM & either an active or passive heat-sink for the GPU - depending how good the air-flow is round your BVision.
All the best.
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