Until PL fixes this, here's some advice that can help you. First of all, I'll assume that you're using Firefox.
1) In the address bar, type "about
:config". It'll give you a cryptic message about "voiding your warranty"; don't worry about this and click "ok".
2) You'll see a list of settings and a bar at the top. At the top, you'll see a setting called "accessibility.blockautorefresh". Double click it to change it to "true" (it'll become bold, too).
3) You should be able to go to the "manage comments" page to delete the stupid comment now.
4) Go back to "about
:config" as mentioned before and double click the "accessibility.blockautorefresh" setting to change it back to false (it'll become non-bold again).
Hope that helps. If you're using some other browser, let me know and I'll try to figure it out for you. Good luck!
And I agree that this is so annoying.