Hi, I've been having a similar problem for a few logins now. I have two blogs and signin using https for the main one, through whose Dashboard I access the Reader, as it shows all the blogs I am following for both my blogs.
My problem is that the Reader shows the latest actual posts, rather than the list of hyperlinks to those blog addresses. When I click onto Edit List, all I get is the small rotating flower/cogwheel (for lack of a better description); no list appears.
I don't want the latest posts. I want my hyperlinked list.
I use both Firefox and IE, the latest versions.
The latest Flash is installed in both.
Firefox deletes cookies on closing, as does IE
I rarely use IE to visit WordPress.
I am on a Windows 7 laptop and connect to the internet directly via mobile wireless broadband through our national telecommunications provider. It's pretty fast!