Definitely seems like the extension... works fine when I uninstall it, or when I don't have autolink checked. But I re-installed it, and it breaks as soon as I check autolink.
A few different things that use Javascript break... clicking the post icon on one of your own posts to change the icon; or clicking the modify icon (NOT the modify button) to quick-modify a post; or clicking to view votes. Clicking to vote itself normally does the vote using Javascript, but if that Javascript fails; it does a full redirect to get the vote in instead.
The real question is why this was working fine for me yesterday, and is still working fine for other people. Could be an issue of browser version. Awaclus, is your Chrome up-to-date? It suddenly changing behavior (without my extension being updated) could be due to an update in the forum software, but then it should be the same for everyone...