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Ah, I suspected so, as for some reason the KEYWORD_BANDING_WHEN_ATTACKING was replaced with KEYWORD_PROT_CREATURES, probably by Mok. But that new keyword was never fully implemented.
I'll do it, but it will function only about damage. I dunno how to implement a "protection from abilities of creatures".

Ahem, I don't see the connection with the Necropede bug (I stated "cards that may target something if they go to graveyard from play"), however fixed.

Fixed.

Fixed.

Ah, you sure are annoying, mates
However, I'll implement the usual legacy card for the graveyard effect. Consider this fixed.

Sorry, the game crashed after I had to choose something, that reminded me of the Necropede thing.

Describe the Bug:
When choosing two targets for Quicksilver Geyser, it just bounces the last chosen target. There's a target symbol on the first target for the rest of the game. (Similar to the Chandra Firebrand bug)

Which card did behave improperly ?
Quicksilver Geyser

Which Version did you use ?(Constructed, Limited)and which update(date,name)
New Limited v2

What exactly should be the correct behavior/interaction ?
Bounce all targets

Are any other cards possibly affected by this bug ?
Cards with multiple targets

Fixed.

As in the Subject, Crescendo of War gives +X/+0 to AI's defending creatures too, even if it should to so only to owner's defending creatures.
About attacking creatures, it works fine.

Fixed.

Describe the Bug:
Gladecover Scout has flying.

Which card did behave improperly ?
Gladecover Scout

Which Version did you use ?(Constructed, Limited)and which update(date,name)
New Limited v2

What exactly should be the correct behavior/interaction ?
Gladecover Scout doesn't have flying.

Are any other cards possibly affected by this bug ?
No

Describe the Bug:
You can't pay the phyrexian mana cost (2 life) of the Vault Skirge. You must spend black mana. The game, however, shows the card as playable even if I don't have black mana available.

Which card did behave improperly ?
Vault Skirge.

Which Version did you use ?(Constructed, Limited)and which update(date,name)
NL v.2.

What exactly should be the correct behavior/interaction ?
I should be able to pay 2 life instead the black mana in the Vault Skirge cc.

Are any other cards possibly affected by this bug ?
No.

Fixed.

Fixed.

Describe the Bug:
Metallic Mastery is tagged as a green card instead of red and thus considered as a green card by Random Singleton

Which card did behave improperly ?
Metallic Mastery

Which Version did you use ?(Constructed, Limited)and which update(date,name)
NLV2

What exactly should be the correct behavior/interaction ?
Metallic Mastery should be a red card

Are any other cards possibly affected by this bug ?
-