All right! I tried your experiment (http://www.youtube.com/watch?v=neaCQ2...) with boiling water. tl:dw? It seems that no steam escapes the pot, despite the wobble. (Also, WOW does this thing heat up quickly!)
I actually went to SLT last night and the lids there seem to fight tighter...but those pieces weren't part of the Coq au Vin series. Ideally, I'd love to send this back to Staub (I sent their customer service a copy of the video and asked if it were covered under warranty) and get a properly fitting set back. If they say no, at least I'll know that this seems to be functionally fine...though, to say the least, I'll be disappointed.
I had an aunt who recently gifted me her unused Staub La Cocette. I'm thrilled to receive it, but the lid has a LOT of wobble and lateral play.
I've gone through the boards and opinions seem to be mixed: some people suggest it's normal and recommend making a gasket to get a tight seal while others say if it's not tight to begin with, send it back.
Here's a video of the wobble. Is this normal??