<img src="/ubbthreads/images/graemlins/beyond.gif" alt="" /> US English version.
While playing at certain times, controls to open the Mini-Map, Inventory, and sometimes when I CTRL+S to save nothing happens, I can push the keys any number of times and even holding them has no effect.
It doesn't create that big of a problem, more an inconvenience as I have to click the inventory button. I usually just restart my game and that fixes it, but it still keeps happening and I'm using the latest 1.42 patch.