Call it blind optimism, but I was almost beginning to believe; and then it happened, the inevitable: Manuel is back. The panic-attacks have resurfaced.
I admit I got carried away. In last week's blog I even admitted I might have got things wrong. Maybe Manuel was the solution to our goalkeeping problems. Who knows, maybe he still is.
Indeed his abilities as a shot-stopper have never really been in doubt; fire in a shot and Manual will probably, and athletically, save it. Moreover, and unlike Jens, pass the ball back to him and he's likely to clear it without giving us any heart-stopping moments of idiocy.
But put pressure on Manuel, pass the ball around the edge of the box, hit it long so it's almost close enough for him to get it - but actually still too far - and the problems begin to arise.
United should not have scored their second goal, and even if Almunia cannot be held completely to blame - where was Ronaldo's marker, after all - Manuel's propensity to panic, to rush off his line and unnecessarily expose his goal, is all too familiar. He did it more than once on Saturday, and he could have cost us more than one goal in an otherwise fine defensive performance.
If it all seems rather familiar, that's probably because it is. Cast your mind back to 2004/5. After a series of costly mistakes, culminating in a series of blunders in Greece during a Champions League match, Jens is dropped. Manuel comes in and, initially, plays well.
But then the big game; then the blunders; then the moments of panic that cost us. Any who recalls the 4-2 drubbing we received at the hands at United at Highbury during that season will remember how culpable Manuel was for most of those goals.
Once recalled Jens was superb, right up until his mistakes at the start of this season. He saved penalties to win us an FA Cup final; and, notwithstanding his red-card in that final, he was absolutely vital to our Champions League run in 2006. And he really wasn't that bad last season.
The question remains therefore: do we persist with a keeper who can't win us big games? And if not, what do we do? Do we recall Jens? Do we throw in young Fabianski? Do we have a goalkeeping crisis on our hands?
Who knows, maybe Manuel will battle back and prove me wrong again. But it seems the negative side of his game is back, and Arsene has to ensure this doesn't cost us. Because to lose out on trophies this year because of a dodgy trophy would be a tragedy.
How many chances does a person get to show they've changed? I suppose we'll soon find out.