Yes I am. And I also had that problem, but fixed it. I just read about it on rgrd
Apparently, it turned out to be because I was using the pseudo-keypad. For that, I had to have Num Lk on - and the shop menu wouldn't work. I turned it off, and it started responding to the keys, even though they had nothing to do with the keypad (such as 'c' and 'd' for the swords).
Laptop equivalent keypad:
789 789
456 uio
123 jkl
Hope this helps!