Battery Update 1.3 doesn't install -- gives me a networking error?

So I've been away for a couple of weeks and left the MBP at home. Found the new Battery Update 1.3 release and had Software Update do its thing.....

Instead of it running, I get this error:

The update "Battery Update" can't be installed.

A networking error has occurred: Error NSURLErrorDomain - 1005 (-1005). Make sure you can connect to the Internet, then try again.

So I hit OK then recheck the box next to the update to try to force it to install, and then I get this errer:

Your hard disk does not have enough space. -3 B is required to download and install the checked updates. Extra space is required for the optimization process. To free up space, remove files from you startup disk, then try again.

So I have a few more than 3B free on my HDD (still 93G free -- are you kidding me!)

The only think I can think of is that I'm running the update from my Sprint EVDO wireless aircard. It's connecting to the Internet fine, so I don't know why this should be giving me a problem. And, yes, my power supply is connected and plugged in.

Any thoughts?

 

Thanks. That seems to do the trick. But why the errors using Software Update?