Rich Trouton and Peter Bukowinski ran into an odd issue on some of their machines. They would time out while trying to connect to a SMB or AFP share with a known good Username/Pass. The problem? iDisk.
The machines would try to connect to iDisk even if the share was an internal-only fileshare. As strange as this sounds, removing some iDisk settings will fix the issue. Rich has the details on his blog.Source: Der Flounder