I have noticed that when one clicks one of the 'diff' links on the Recent changes page, one does not see the diff of the change to the right of it, but the last change to the page, whichever it was. Is there a reason for this? I would think that the other functionality would be better.
That bug has already been reported. It's just a pain to fix, and I'm working on other implementations of the "Recent Changes" page now anyway, so there's not much point to fixing what's going to be replaced.