[I've move things back into this thread to make the two threads a bit easier to follow & come back to, although they may both turn out to be about the same issue. Not sure yet.]
That's because this option has been turned on:
That should only be on if you're trying to diagnose issues with incorrect or blank icons in context menus.
Could you try a creating a manually generated process dump when things are going wrong? That will help us see if it's the same type of problem as in the other thread, or something else, and may help us solve what's going wrong.