As much as the keeper was at fault it doesn't mean he's necessarily a bad goalkeeper overall. Coming into a team he doesn't know and being rusty obviously played a part. We've been spoilt with keepers of late. However going for the play offs means we can't really 'test out' keepers in the hope they become good.
Sorry but it's to easy to blame a keeper, last goal it shouldn't of been played back to him in the first place, then another phase of play where the ball should of been put into row Z. I'm sure he will come good.