Hi,
"clutter" with both Vector and Monobook :-): If you look at URI:http://commons.wikimedia.org/w/index.php?title=File:Flag_of_Denmark.svg&action=history, there are "(undo)" links for all revisions including those "uploaded a new version of ...". If you click (URI:http://commons.wikimedia.org/w/index.php?title=File:Flag_of_Denmark.svg&action=edit&undoafter=39204064&undo=39895599) on one of those (with the intention to revert the image to the previous version), you get an edit form with a prefilled summary line ("Undo revision ..."). Press "Save page" and nothing is changed at all. Edit the summary line and press "Save page" and still nothing is changed at all.
So what is the use case for these "(undo)" links? ATM they are very distracting, as the actual reverting of uploads happens on the "front page" (URI:http://commons.wikimedia.org/wiki/File:Flag_of_Denmark.svg#filehistory).
Tim