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In a similar vein to this question, I'm having an issue with the "new questions with activity" feature on SO. It works fine on any other Stack Exchange site.
I've left the window open for about 20 minutes now, and it doesn't update the list with any interesting questions with activity. I even threw in the C# tag into my favorites to make sure that it wasn't just my favorite tags.
I'm using the latest version of Chrome on Xubuntu Linux.