When you have exactly 100 potions it shows up as 10. 101 shows up correctly as does 99. I did not have the gold at the time to test 200 and 1000.
When you are trying to move items from one bag to another if you have items in your inventory under where the display comes up for bags you will sometimes click through and fail to be able to move items from one bag to another.
It is very difficult to see the map with some effects and backgrounds. Possibly a configuration option menu for map colors and player dot to make it easier to see.