So, I am not the only one. Christopher Phin joins the typographic soirée just a few weeks ago with this short but sweet top-ten list of common typographic errors.
You may not agree that the decimal point in prices is incorrect — (interpunct anyone?) this may be an UK convention that we threw into the bay with the tea — but his list is worth a quick read and should be committed to memory.
Note: in case you didn't notice, Phin is from the UK. They have other typographic practices that many in the US find unusual (such as omitting periods from abbreviations such as Dr and Mr), but that's OK. It's not wrong, just different.