"In January, we did not support a coalition, and we do not support a coalition today or tomorrow,"
In other words, "ignore my signature on the coalition agreement." A signature being different than a mere statement or utterance mind you. It is a solemn act of agreeing to be bound to what you are signing and has been the principal means by which mankind has bound the author for centuries. Perhaps Iggy's signature was taken out of context, or given under duress or coercion?
To the contrary, here are Iggy's public statements at the time:
“I’m prepared to form a coalition government, and to lead that government and to provide Canada with the security and stability it needs.” (Ottawa Citizen, December 11, 2008)
“I told the caucus this morning very clearly I am prepared to vote non-confidence in this government and I am prepared to enter into a coalition with our partners if that is what the Governor General asks me to do,” Ignatieff said (Canadian Press, December 10, 2008)
(Footnote: The link is from the CBC, which simply parrots Iggy's recent statement without mentioning these pesky little contextual statements.)
Update: Video from ST