I seem to be having the same scrolling difficulty mentioned in Broken 10k tools flag page? and Stackoverflow Scrolling Problem (Video Inside), this time on the profile page.
When viewing any of the lists under the various tabs other than "summary", if there's more than a window full of content, the scroll bar "fights" being scrolled further than about halfway. If I manage to get it to the bottom of the page, it will re-scroll itself up to the top. It's acting as if it is reloading some content below -- and indeed there's a little notification continually popping up in the browser's status bar that something has "Finished loading" -- and constantly resizing the page.
UPDATE: In addition, items with disclosure triangles, such as individual reputation changes or edits, will not display; they open very briefly and immediately re-close.
This was happening with a WebKit browser, OmniWeb 5.11 (v622.15) and Safari 5.0.1 (6533.17.8), on Mac OS X 10.6.8, and continued after I updated to OS X 10.7.3 with Safari v5.1.3. I don't see it with Chrome or Firefox.