I recently ran into a problem where Visual Studio 2005 would NOT run IE7 and insisted instead on Firefox when debugging. This was a little irritating as it rendered the debugger a bit useless. Even though the preferences in VS were set to IE it wasn't until I found someone else having the same problem and posted a fix did I manage to get VS to use IE again. Why would it do this??? When this is possibly the *only* time IE is absolutely required does MS seem to default to another browser!