Collectible Card Game Headquarters

Describe the Bug:
1) When Spirit Mirror's activated ability is activated, all permanents except for Reflection creature tokens and copies of those tokens (e.g. Clone) receive a prohibition sign for the remainder of the game, making them untargetable.
When s Mistform Ultimus enters the battlefield, permanents controlled by its controller lose said prohibition signs (until Spirit Mirror is actiavted again). Creatures with changeling don't seem to remove prohibition signs upon entering the battlefield.

2) Spirit Mirror's activated ability can't target Mistform Ultimus or creatures with changeling.

Which card did behave improperly ?
Spirit Mirror

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
CoRM15 mini4, duel

What exactly should be the correct behavior/interaction ?
Prohibition signs on non-Reflection permanents are removed after a target for Spirit Mirror's activated ability has been chosen.

Spirit Mirror's activated ability can target Mistform Ultimus and creatures with changeling.

Are any other cards possibly affected by this bug ?
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Note: any creature with the untargetable sign isn't just untargetable. Wrath of God doesn't kill them.

All fixed in d0bd02b