Problem: I have a group of nested Views that is not displaying content after updating to Views 3.3.2. In Views 3.2.2.1, I am able to see the content I expect to see.
Solution: In this case, a Content Template shortcode nested in one of the Views did not use an explicit view_template attribute, and the newer version of Views is not able to infer which template to apply here. An update to the shortcode solves the problem.