A good question. Which game was it and where is the corrected version? Dunno. I had to delve into the April games and eventually (with engine help of course) I worked out that in
[Event "Angora GM Schev"]
[Site "Ankara TUR"]
[Date "2010.02.24"]
[Round "6"]
[White "Yakovich, Yur"]
[Black "Erdogdu, M."]
[Result "1-0"]

there is a point in the endgame (about which Gawain writes  "Black survives for a long time but the result is never really in doubt" - oops, wrong...) when it seems Black could have saved the game: 39 c6? was a blunder, allowing 39...h4 which the engine says is equal. OK, this was probably easy to overlook, since White did indeed seem to be cruising to victory.

Generally G's annotations are very good, as far as I can see at my relative patzer level.

I do wish though that there was greater interactivity in this section. For instance, I've sent material to CW and it seems to just disappear into a black hole. And my impression is that it is rare for anything mentioned on the forum to be picked up in an update.