Hi @left channel Can you do me a favor, next time this happens, try putting your cursor into the URL / address bard to highlight it and just hit enter to load the same URL. Let me know if this works.
On a Windows machine I am experiencing some similar, but not the same, behavior as you. When I click a link form the activity stream it's loading a comment further up the thread. If I just reload the page by doing what I described above, the correct comment loads.
Not that this is a solution, but I want to know if it's the same issue as you.