Using Chrome 26.0.1410.43. on Windows 7
I've noticed this has been happening pretty much ever since the following feed/friends activity feature was enabled. It's supposed to function as a real time stream of activity, essentially like this, only for your friends/people you follow. Only it's not updating anything past almost a day ago. This is what my friends feed looks like right now
It's unfortunate, because it makes the social aspect of the site even more sterile and lonesome than it already was without the ability to see which of your followers is online (there used to be a tab for this) and without the dropdown of 10 users who were online.
Either or both of these features being restored would be awesome.