Yeah, December 3, 2009. Bills vs. the Jets in Toronto (a loss) and the Sabres at home vs. Montreal (a win).
http://scores.espn.g...ameId=291203002
http://scores.espn.g...ameId=291203002
The next most recent example looks like December 17, 2005. Both teams were at home - the Sabres vs. the Pens (a win) and the Bills vs. Denver (a game that prominently featured a touchdown pass from Kelly Holcomb to Joe Burns - so of course it was a loss).
http://scores.espn.g...ameId=251217002
http://scores.espn.g...ameId=251217002