When hovering over the reputation graph on my network profile, the tooltip shows all entries on top of each other instead of as a list (as it did yesterday).
I use Internet Explorer 9 on Windows 7. I tried clearing the browser cache and reloading the page but to no avail. The issue did not show up in Firefox 10, but did in the preview version of Internet Explorer 10 and the mobile version of IE on Windows Phone 7.5.
Looks like there was a similar issue reported a year ago.