I recently installed the latest update to IE7 beta which is IE7 Release Candidate. After that, I can no longer click on an embedded e-mail hyperlink to open my default browser which is Firefox. Instead, I get an error window that says, Microsft cannot open this file----" and lets me open another window with a list if apps including Firefox which, after I select it, works fine.
Even though I check the box, "Always use the selected program to open files of this kind", I still have to manually select the browser app for every subsequent hyperlink I click. None of this hapened until I installed the IE7 update.
So far, I have not found any solution to this problem even after posting on several MS forums and querying MS Support.