It happens.

http://en.wikipedia.org/wiki/Stiglers_law_of_eponymy

You're missing an apostrophe. Will HN linkify this correctly? http://en.wikipedia.org/wiki/Stiglers_law_of_eponymy [EDIT: no, it won't, and I suspect the parent included the apostrophe and HN removed it. So let's try a different way: http://en.wikipedia.org/wiki/Stigler%27s_law_of_eponymy ... yup, that works.]

It's pleasing to note that the law applies to itself; Stigler was not its discoverer, and of course he was well aware of this when naming it.