Novell GroupWise 8
If a mail message containing a URL is received, the GW client will return an error if that URL is missing the http:// header. The error message returned is "Windows cannot find '<URL'. Make sure you typed the name correctly, and try again".
This occurs if Firefox is set as the default browser in the GroupWise client. If the client is set to use Default Browser, then the link opens fine, even if Firefox is set as the default browser of the workstation