Collectible Card Game Headquarters

Describe the Bug:
When Meloku the Clouded Mirror's activated ability is activated and its controller is prompted to choose a land to bounce, the client provides a cancel button. Clicking that cancel button results in a creature token being put onto the battlefield without a land being returned to its owner's hand.

Which card did behave improperly ?
Meloku the Clouded Mirror

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
JOU, duel

What exactly should be the correct behavior/interaction ?
Either tha player isn't given a chance to cancel teh ability or cancelling the ability rejects the spent mana back to mana pool and no token is created.

Are any other cards possibly affected by this bug ?
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Fixed in a2e7c0b

Can't check as it can't be cast. Mana gets rejected back to pool and card doesn't go anywhere. Try to debug it into play and game crashes (it looks like it triggers an ETB effect that goes bad).

Stupid bug is stupid. Fixed (and tested) in 4ed9ed7