I use the /Week page as my main entry to TheRegister but in the last few days some odd behaviour has manifested itself. It may have been there longer but I think I would have noticed. Basically, scrolling using cursor keys is screwed up. For example, the up and down arrow move me to top and bottom. At the top, the pgdn key moves me a page down but hitting it again takes me back to the top. Pgup has similar issues at the bottom of the page. The main homepage works ok, as does the weekend edition and the individual articles. This problem occurs with firefox and palemoon but not chrome or IE.
Mouse scrolling works ok,