Since downloading 1.3, I'm having substantial fps issues (primarily in dungeons, not outside) to the point that I seem to spend more time hitting Lydia than my intended target. I can't seem to identify any consistent reason for the fps drops besides being in a dungeon/cave. Prior to the patch, I would have fps trouble with watery dungeons, along with the occasional random hiccup (which I always attributed to some other system process kicking off), but post-1.3 it occurs much more often. I run at Low settings always (I play on laptops...I know, I know, don't start with me...haha).
In addition, I'm having alot of trouble getting any re-bound keys (especially the extra M3-M5 buttons on my gaming mouse) to work consistently. The main ability I'm having trouble with is my Shout (which, at this point, is only Fus Ro). It's caused a number of deaths and is quite annoying. At first it seemed to be only an issue if I tried to bind Shout to M3, M4, or M5, but I've bound it to C now and am still having intermittent issues.
Anyone else experiencing this?

any amount of 'blowing mist' (can get stutter-stop in some parts), or C) waterfalls (which may just be the mist problem).