First thing to check are any mods that you may have. Also, any stability or performance mods like TESVAL or Skyboost won't work with the new patch. Same with the ENB mods and the DLL files. Those mods may get updated for the new patch, but they are not really needed anymore.
I will close this as we want folks to use the thread we set up for the patch
http://www.gamesas.com/topic/1341234-unofficial-patch-14-pc-issues-thread/