I updated to the latest Fennec nightly after quite a while today and noticed this. When opening a new post in Google reader (the mobile version) or panning through a post, sometimes part of the random content gets rendered at the bottom right corner of the screen (in about a quarter of the screen). Repainting causes the problem to go away. Seems like the contents of an old layer get compositted or something... This can be reproduced fairly easily.
Or bug 649583?
This was a dupe of bug 649583 indeed, as it was fixed in today's nightly.
Status: NEW → RESOLVED
Last Resolved: 7 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 649583
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