And this still hasn't fixed the pagination problem... whenever I search for something, I can't see more than the first page of search results
Hmm, not sure about why that would happen, but you might be hitting the search flood limit, which was 15 seconds. I've reduced it to 5 seconds for registered users, so if you wait a moment, then try again, it ought to work. Kinda dumb if it counts separate pages as individual searches though.
The only negative to this upgrade at the moment is that the breadcrumbs seem to have been changed.
I noticed that too, but I've learnt the hard way that in order to preserve sanity, if phpBB does something a bit weird that isn't essential, just shrug and move on. I think we'll get used to it, there are still links to the main forum index. Also, I do like Quick Reply