From The Globe And Mail:
The Montreal Alouettes yesterday filed an official protest with the CFL over a disallowed touchdown in their 19-12 loss to the B.C. Lions last Friday in Vancouver.
Montreal tailback Avon Cobourne appeared to score on an eight-yard run with less than one minute remaining in the game before Murray Clarke's officiating crew huddled and ordered the down replayed.
The officials said they had been buzzed by the in-stadium supervisor to stop the play in order to check the game clock, and that a whistle was blown during the play.
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Update: Blown call leads to apology from CFL -- National Post