January 31 2012 Daily Challenge bugged. When you fully upgrade left track (4/0) of a tower and then purchase right side (4/1) tower stays at 4/0 graphically but money goes away and if you continue to click it goes all the to fully upgraded right side, but loses the effect of left side and becomes a super expensive 2/4 tower... UGH!
complete-all-challenges-in-one-story-mode-game medal is broken - you can't get credit for the 5 combo or the 5th destruction (the wall) because doing either ends your game. other than that, GREAT GAME! 5 STARS!
 "Obliterate Everything 2"){kind=icon}
 "Bloons TD 5"){kind=icon}
 "Learn to Fly 2"){kind=icon}