Some Minor Ingenious Bug Fixes
The first bug was a wording issue with dropping a tile in an invalid position. The text now applies to all moves rather than just your first move.
The second bug related to starting to move a tile while the computer players were playing. The moved tile would not snap back into its original position as it does if you wait for the computer players to finish, move a tile and then decide to start moving another tile. It was as if the game forgot how to snap the tile back to the rack. With the bug fix, if you drop a tile while it's not your turn, the tile will go back to your rack.
I've also updated the text on the game back to indicate that you can hit the x-key or escape to close dialog boxes. That's always been available but wasn't stated in the page.