This is getting really really annoying. I start debugging my web app using Visual Studio, and regularly Internet Explorer just sits there saying "Connecting..." in one of the tabs, but if I open another tab I can usually go to the page that the first tab was going to, but sometimes not,but of course the new tab is a new thread so the debugger isn't attached to that one and I have to restart or detach/reattach the debugger until it works.
Seems to work after closing the ASP.Net Development Server that starts up, but not always.
Doesn't happen when I debug in Firefox, but I can't debug my JavaScript using VS from there. Luckily I can debug Silverlight in Firefox which takes a bit of the pain off.
There are no extensions on IE as I use Firefox for pretty much everything bar testing.