UPDATED - Liberals walk out on vote to endorse appointment of Michael Ferguson

First, the setup: Courtesy of the Liberal caucus press office, a copy of the letter sent by interim party leader Bob Rae to the Prime Minister this morning, affixed with a cheery 'Stay tuned!':
 

November 3, 2011
 
The Right Honourable Stephen Harper, P.C., M.P.
Prime Minister of Canada
80 Wellington Street
Ottawa, Ontario
K1A 0A2
 
Dear Prime Minister Harper:
 
When you advised me of the appointment of Mr. Michael Ferguson as Canada's Auditor General, you asked for my opinion, as is required by legislation and parliamentary practice.
 
In your letter you did not indicate that the candidate did not meet the government's own written requirement that the successful applicant must have command of both of Canada's two official languages.  The government broke its own criteria.
 
I am writing today to ask you formally to not hold a vote on Mr Ferguson's candidacy later today, and to start a new process to find a qualified, bilingual candidate. 
 
A process that states there are basic qualifications, and then ignores those qualifications, is a breach of the fundamental rules of natural justice.
 
It is impossible for us to accept the ritually re-stated comment that the "best candidate" was successful.
 
Sincerely,
 
The Honourable Bob Rae, P.C., O.C., M.P.

 
The teaser: According to a subsequent heads' up from the self-same Liberal communications shop, if the PM fails to heed the request to call off the vote on a motion approving the appointment, the Third Party will rise in its collective place and walk out of the House, much as opposition members did during yesterday's in camera ethics committee meeting. 

The outcome: To quote the above noted advisory, stay tuned.