This problem started ocurring after I had installed Visual Studio 2011 beta. Either I run my asp.net site with or without debugging, browser doesn't open anymore. Web server starts working(asp.net development server and/or IIS Express) but no browser is opened automatically when I click the link [localhost:myport] from web server's context menu.
Any suggestions what the problem could be?
[UPDATE] Also links in "MS Outlook" and "MS Word" stopped working.
[UPDATE2] Fortunatelly the fix was found: http://support.microsoft.com/kb/823301