Can't Install Usa 2.1.3b Patch

I had problems getting the patch. It would complete the download with out getting the full 16.1mg so the file was junk. But I got all of it eventually. What I want to know is what the patch fixed and or added the last patch was great but i haven't noticed anything different.

Anchors Away

I know it fixes some bug in mission 3 (germand at least)