Per Bob McKenzie...
BUF has initiated compliance buyout procedures on Christian Ehrhoff. Not official just yet but BUF has begun the process.
Presuming paperwork on d-man Ehrhoff processed as expected, that's two offensive threats - SJ Marty Havlat bought out - added to UFA list.
I'm sure @capgeek will have details but BUF obviously feared potential cap recapture penalties if Ehrhoff retired before contract expired.