This has probably been hacked and diced before but...
How is it that Rachel meets Chandler at the Bar but doesn't remember who he is? And he apperently doesn't remember who she is?
I don't know which episodes happened in which order. But my only guess is that 3.06 was filmed before The One With All the Thanksgivings where they flashbacked to Monica & Ross parents and Chandler got his toe cut off... and the writers goofed up and didn't realize it.