Nope, it was always the way it is, and the fact that you haven't noticed it till now kinda shows how small the chance is that it's going to happen. :) Actually, there's only a 33% chance that the thing will be doubled in the first place (you need to roll 2 on 1d3 for it to double). So, you got very lucky (or unlucky, depends on who got to beat it in the end) that two of them got the proper roll together (11% chance - in addition to the fact that each player has to have at least one GGoW and be willing to risk using one in case one is already used as a double). As for how devastating it is, it depends on how much chance you'd like to take. Generally, if you use the Greater Glyph of Warding, it's assumed that you either have a Destroy card handy in case your plan backfires (without the Backfire card, so pun unintended :)) or you're ready to take the risk and you know exactly what the upsides and the downsides may be in the long run, and if you beat a doubling GGoW with another GGoW, you're either too audacious or you're absolutely sure that you can deal with it should the things go badly (or you have Glyph of Reversal handy, or maybe you simply don't have any other option - a situation referred to among Gauntlet players as a "no choice situation"). Risky Master will almost always choose to take the chance of doubling GGoW with another GGoW btw, and maybe that's who you were playing against. But typically you don't take such chances, and you just Destroy everything (not even just the counterspell, but the entire stack) in case things start to build up dangerously. This is a cool feature though, and I won't take it out - it's always been like that in RL Gauntlet, and in almost ten years of playing, we've only seen like maybe ten truly powerful uses of GGoW (and whenever it happened, it was cool). :) Because otherwise, any good player will be very cautious when dealing with GGoW and especially with a GGoW that has doubled.

Hmm?... Not sure about this one, I'm looking at it right now and can't tell which way is up. I can flip it 180 degrees - do you think it'd be more correct that way?

Strange... Well, it does for me... What do you mean it doesn't use it? It doesn't play it into the permanent zone or it never ever ever EVER taps it?... OK, let's say we're talking Grandmaster skill level here. For me, it plays it into the permanent area (always), and it smartly taps (or doesn't tap) it depending on the overall situation - it won't tap it at every single opportunity of course, it never makes sense in Gauntlet to do that. Were you, maybe, playing against the Newbie? He'll typically "forget" about City Guard Post (and not only it) - prolly too often for his own good btw. But hey, novices typically do, especially in real Gauntlet when they have to look at their cards in the hand, they typically just attack (or block) and then say "OK, I'm done", forgetting to take a look at their permanent area.

Yep, I did. :) Is that bad? Well, it kinda looks great both as a background picture and as a card art image... :P

Yep, your rating is the difference between the winner's life and the loser's life, multiplied by your round score. So, score 3 points and you'll get x3, score 5 points and you'll get x5 - kinda makes you want to win better. Winning with 1 point is always lame btw, in real Gauntlet, the losing opponent will always try to take every opportunity to lose with exactly zero life points and then mock the winner with it, because it's always worse for the winner. Master AI skill levels in Flash Gauntlet will try to emulate that by always trying to reduce damage dealt to them, hoping that their score won't go as low as it otherwise could.

By the way, another fact about real-life Gauntlet: in real Gauntlet, you can also concede (but only if all players agreed before playing that it's possible to concede). If the player concedes, he loses (it's never a draw even if the players' life is equal) and the winning player scores 2 points, not 1 point. Also, the minimum rating gain in case of a concession is +10, so even, let's say, one player has 5 life and the other player has 4 life, and the one with 4 life concedes, sensing that he'll be dealt, e.g., 15 damage right now for a huge rating loss, the winner will still get +10 rating points instead of just 2*(5-4)=2 rating points, because +10 is the absolute minimum in case one of the players concedes. But that's just a side thought about conceding, it's not (yet) implemented in Flash Gauntlet.

Thanks for your testing efforts, they're very much appreciated

1) Were you attacking or blocking?
2) If you were attacking, what was your attack and how did the AI block? If you were blocking, what was the AI's attack?
3) What was in the AI's permanent area?
4) How much life did you and the AI opponent have?