2011/11/10 Federico Leva (Nemo) <firstname.lastname@example.org>
I purged the file on Commons, this should remove all thumbnails; I
reloaded the page in edit mode, it showed a black square, then it loaded
a new image, is it correct?
Yes. it is correct; but what is wrong is, that in view mode a different thumb is showed! This causes lots of confusion in users.
I presume that it comes from something specific of proofread extension; I presume that thombs fro view mode are cached somewhere specifically.