I've seen quite an error in the html generated for the page presented when you click 'join' on a community. In the last bit, the actual 'join' button comes out like this: <input type='submit' value=Word lid van deze groep/> (note no quotes around text for the button). Which results in only the first word ('word' in dutch) being shown on the button in NS 6.2.3 . I could fix it in the translation, but it is wrong even for English (LJ) where the text reads join community, but only join appears on the button.
I'd report it in the bug system, but that is bugged... ;-)