I've been using the AppCenter versions of applications when they're available, figuring your devs made sure they worked with the idiosyncrasies of elementary OS. However, the recent upgrade resulted in an unusable browser (image attached)
I uninstalled the version from AppCenter and installed the real one in the Ubuntu repository via Synaptic and, Bob's your uncle, I'm in business.
If you have the same problem, save a backup of your profile (bookmarks, history, etc.) or make sure Sync is working--I lost mine.