Update to Safari 6.0.2 gives error message "The operation couldn’t be completed. (NSURLErrorDomain error -3001.)(102)"

Every time I try an update I keep getting the error message

"The operation couldn’t be completed. (NSURLErrorDomain error -3001.)(102)."

Once I get this error message and try to update again, I get told there are no updates. I have to cancel the first attempted update and close all message windows before it lets me try again, and guess what, same error as above.

Is anyone else having this problem, or know how to fix it.

Not sure at the moment if this is an Apple related problem or a problem with my machine, but everything else worked ok, including an earlier update to iPhoto