There should be no add-on problems with this minor patch, and it is by no means as extensive as Patch 3.2.2 which dropped earlier this week.
The biggest bug fix for me is that Wintergrasp walls will not display correctly. They weren't all showing up before exactly right, and it was more of an annoyance than a game-halting bug. But it's nice they fixed it. The other big thing that was fixed for many people, although I haven't experienced it on my systems, is the Mac client crashing often due to an ATI bug.
The entire patch announcement and "patch notes" after the break.