We have upgraded our testenvironment with .NET 3.5 SP1 on the sharepoint frontend servers.
That causes problems:
.net 3.5 brings in a security fix that affects distributed sharepoint environements e.g. webservices don't work anymore and problems with the formsserver because of security issues. This problem is handled by modifying the hosts file and setting a registry entry.
A good description of what to do can be found here: http://www.crsw.com/mark/Lists/Posts/Post.aspx?ID=44 and a MS KB article here: http://support.microsoft.com/default.aspx?scid=kb;EN-US;896861
Is that all?
Are there some more hidden problems?
How does the .net 3.5 affect the kerberos things?
Does anyone of you have similar experiences about that?