Since I installed IE8 a few days ago I cannot access the forums, for example:
http://social.msdn.microsoft.com/forums/fr-FR/1484/threads/
leads me to
http://social.msdn.microsoft.com/Error/Error500.aspx?aspxerrorpath=/forums/fr-FR/1484/threads/
Access to the forum works perfectly with Chrome (in fact I'm using it for this post).
Thank you for your help,