Problems after installing TFS SP1

I installed today TFS SP1 on my customer’s production Team Foundation Server and after the installation (which was successful), all connections (even from the server machine) result an error.

The first one was 'Http 403 forbidden' from browsers, and also connection problem when trying to connect to TFS using Team Explorer.
You can find the workaround for this problem at section 6.9 of the TFS SP1 Known issues doc: http://msdn2.microsoft.com/en-us/teamsystem/aa948855.aspx .
This problem occurred cause during patching TFS SP1, Team Foundation Server configures IIS to not accept requests from remote connections.

The second problem was "TF30059 : Fatal error while initializing web service" after I tried to see Source Control.
I saw that TfsActivityLogging, TfsBuild, TfsIntegration, and TfsVersionControl databases were configured to single-user mode. I changed the mode back to multiple according to this manual: http://msdn2.microsoft.com/en-us/library/ms345598.aspx but I set multi, not single. The reason for this problem is that TFS SP1 leaving SQL server in single user mode and not alter the database back to multi user mode.