[confirmed]Grand Architect mana can't be used activate abili

[BAgate]

Describe the Bug:
Mana ability can only be used to cast artifacts, not activate them

Which card did behave improperly ?
Grand Architect

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
2014/02/18: Born of the Gods v2 - DUEL

What exactly should be the correct behavior/interaction ?
can be used to activate artifacts

Are any other cards possibly affected by this bug ?
-

[Aswan jaguar]

Also it's ability to produce artifact mana if you tap an untapped blue creature taps only itself other blue creatures remain untapped and so unlimited artifact mana.

[Gargaroz]

the first bug is an engine limitation, so it's unfixable right now.
The second is fixed in 254624b