How to scan video for (blue blocks) artifacts

Due to some hardware or software failures moving blue artifacts (see screenshot) sometimes appears on my final encoded videos. Is there any filter or something that allow to find frames with such blue (always blue) blocks?

From RT_Stats (avisynth plugin). Code:

Wow, great! I can't even tell how it useful. Many big thanks StainlessS for all your work! With some tuning of *_MIN and *_MAX values got perfect artifacts detection and now know what to reencode. Thank you again! Going little away from subject - may be someone can guess what was the cause of this blue blocks, why they are blue, and why no other corruption but only this kind. After days of tests with memtest86+ and prime95 my hardware looks good...

Perhaps a moderator could approve your pending attachment. EDIT: By the way, try photobucket.com next time, paste url into post and your pics appear instantly, (puts moderators out of work, but who cares about that :) )