It probably depends on the type of company, but if there is a compliance/legal department, they're the ones looking for typos and stuff and even the marketing department.  Specially when it's content (as opposed to a WinForms dialog box, for example) I don't think proofreading is part a tester's job, but correct me if I'm wrong.<p>Of course, the ones you mention are pretty blatant, so I would assume that it would benefit him to mention them since it shows great attention to detail and quality.