There is one thing you can count on with basements: given enough time, cracks will appear. Every crack tells a different story, but whatever the cause they need to be dealt with quickly, to avoid further damage.
Anecdotal evidence suggests cracking of concrete structures and components appears to be on the rise, often resulting in conflict between involved parties. Sometimes described as severe and/or excessive, it appears the cracks occurred even when specifications were strictly followed and the concrete designed, supplied, placed, and cured in accordance with formal standards and good practices of the construction industry.
The Governments of Canada and Québec are committing to spend $30 million over three years to help those homeowners affected by pyrrhotite, which has caused concrete cracking in the Mauricie region of the province.