Infamia!
I listened to the entire Tosca broadcast on XM sat radio last night. The singing was excellent. The orchestra sound great, one of the best Toscas I have heard.
However, I was shocked at the booing at the curtain call for the production staff. The audience went nuts for the singers and James Levine but then the designer and producer came out and it sounded like George Bush just walked in.
Here is a recording of the curtain calls. The booing starts about after about 2 minutes. Keep in mind, these are men in tuxedos and women in long gowns.
http://www.zshare.net/audio/65934856fc13b669/