Peridoc from Daggerspine has collected a bunch of them, including the ones above, delays on some characters in the loading screen, and alignment on the Battlegrounds score sheet.
Lots of people (including our good commenters) are mentioning that icons have gone all wacky everywhere-- some icons have completely disappeared and some just show the wrong thing. Some textures have messed up, too. Blizzard is collecting the issues here, along with video card specs, which means it's probably a driver problem-- upgrading the drivers on your videocard wouldn't hurt. If you've got an Nvidia, you can get those here. Just know that it is being worked on.
Finally, MBAzeroth (and some more commenters) have said there's a problem in AV (and, I believe AB): flags can be capped from many yards away. Obviously, that makes defense pretty unmanageable. Blizzard knows about the issue, and is, as always, working on it.
If you've got more bugs, you can include them below, but don't forget to drop them on Blizzard's tech support site, too-- the quicker they know about them, the quicker we'll see them fixed. Someone said the target frame thing was a problem with CTRaid, so updating addons wouldn't hurt, but most of these are real bugs (I'm guessing they have to do with little upgrades to the actual game engine for the expansion, but that's just a guess). At any rate, when you head out into Azeroth, be ready with your bugspray.