Conditions: Somehow I managed to obtain 6 of 5 gold doing quest as a child. I obtained an extra gold sometime before turning in the warrants so that I had 5 of 5 when turning in the warrents to the police guy then proceeded to start and complete the Monty and Belinda quest resulting on the 6th gold piece.  I believe the extra piece was from either the warehouse quest or the boozer quest.

Resulting Problem: Mugo (the merchant) does not interact or offer to sell the music box if you have any number of gold other than 5.  Thus, forever will Sparrow remain a child.

Severity: Halts all progress in the game.

1 1/2 hours time lost.  Attempting to charm Mugo has no effect.  Farting on Mugo has no effect.