This one is really weird...

Cruising at FL340 late yesterday center comes on and asks do we need to descend to FL240.

Ummm...no, not that we are aware of?

Then center says that all CRJ200's operated by these companies (lists most of them) are now restricted to FL240 due to extreme cold at altitude...

We were in relatively warm air, nothing too cold for the flaps. We sent a text to company, no response. Started the descent (we were about there anyway) and landed normally.

No emails, haven't heard anything about this...anyone know what's up?