TalkingPointsMemo and Anchorage Daily News changed to Disqus for their comments system. Suddenly I can't see the comments. I contacted TPM and enabled cookies and third party cookies, etc. per their tech person. Still doesn't work unless I start in safe mode. I was using Firefox 3.6 and tried uninstalling and going back to 3.5. Installed and uninstalled several programs, etc. Nothing works. It works in IE8 and Google Chrome so I cannot figure it out. Any clues?
If it works when you are running in the Firefox SafeMode, one of your addons is probably causing that issue in the normal mode.
I narrowed it down to the Ghostery extension. Go in its settings and remove Disqus from the "Bugs" list.
Solved this on my PC by changing back network.http.sendRefererHeader to its default value of 2. Accessable via about:config
I had this problem, so I came to this area and tried the suggestions. I disabled my add-ons, one by one. No dice. I unclicked Hardware Acceleration. No dice. I went to the default appearance theme. No dice. I went to Safe Mode, and it solved the problem. However, you don't want to stay in Safe Mode permanently, and when I went back to regular mode, the problem reappeared.
Finally, I lit a stick of dynamite, and reverted to the default Firefox, which zaps all the stuff you have added except for bookmarks and a very few other things. By the way, if you go that route, and it's not that hard to get back to normal afterwards, be sure and note which add-ons, themes, etc., you are now using if you want to reinstate them. Memory likely won't cut it.
Well, anyway, as I reinstated add-ons, I found the problem. It was the No-Script add-on. I had disabled it previously, but I had not deleted it. Apparently, deleting it did the trick. Disabling was not sufficient.
So, in my case at least, it was No-Script. Now I can see Disqus comments again.