Jos van Eekelen , Oct 30, 2011; 09:45 a.m.
The web is full of focusing problems with every camera. None focusses correctly in complete darkness, or with f/13 lenses.
Seriously, most cameras focus reliably under normal circumstances. The comments on the internet often relate to user error, or to very critical situations. There are a few focusing issues though, that's why most cameras nowadays offer micro adjustment. I don't have the impression that the 7D is especially prone to focus issues. And of course, some cameras or lenses are offspec, either out of the box or after some use.