MONTREAL – Led by gains at Videotron, Quebecor’s third quarter profits rebounded back to the black year-over-year.For the period ended September 30, 2014, net income attributable to shareholders was $45.1 million, compared with a $188.8 million net loss attributable to shareholders in the same period of 2013, a favourable variance of $233.9 million including the total $181.0 million favourable non-cash impact of fluctuations in the value of goodwill, intangible assets and derivative financial instruments.Quebecor's consolidated revenues dipped 0.2% year-over-year to $1.02 billion, and adjusted operating income fell 0.3% to $380.2 million. On an adjusted basis, income from continuing operations was...