At the present time VMware Fusion 5.0.2 is the latest version of VMware Fusion and there are no updates available, so stop checking for updates and turn it off in VMware Fusion Preferences! 
Yes VMware is, at the present time, having problems. Have a look at: Re: "Certificate error occurred for the update server." msg when doing a VMWare Tools Download or Check for updates (Which by the way was the top thread in this forum before you posted!)