1) Many old UK comics were half a pence i.e. 0.005. This figure is rounded up by comicbase to £0.01. It would be useful to be able to have the price stay at 0.005p
2) U.K. went decimal in 1971. With one British pound being made up of 100 pence. Before this UK currency was very odd, being divided into pounds, shillings and pence - £, s, d
One pound was made up of 20 shillings (20s) or 240 pence (240d). One shilling was therefore equal to 12 pence or 12d. Comicbase currently can't handle this.
3) Yugoslavia no longer exists but there are many Yugoslavian comics with the currency code for the Yugoslavian dinar being YUM. Comicbase can't currently allow these comics to be entered.