Noticed in version 0.8.2.4 After reloading the game since resetting the controls (such as after updating it with Steam) the rotate block hotkeys will be reverted to: Rotate Block Forwards: F Rotate Block Backwards: G Attempting to modify 'rotate block backwards' will result in that cell (usually showing the hotkey) blanking. This goes for both cells beside 'rotate block backwards.' While blank, the last set hotkeys will still function as usual. Steps to take to view this issue: 1. Reload TT after resetting the controls (such as after updating it with Steam.) 2. Open the controls menu and try to rebind 'rotate block backwards' 3. Notice the cells blanking. 4. Try to rotate the block using the hotkey you set (but saw no visual feedback for.) 5. Notice how that works. Incidentally, after I closed the game by pressing the 'x' on the bar at the top (it was in windowed mode) it crashed. I have appended the log to this post.