I did open a case for this.
Aruba is in the process of moving everything from Airwave over to Aruba.
7.4.8 now lives within Aruba's domain, while prior versions are still within Airwaves domain.
The script's URL was pointing at Airwave for 7.4.8.
When I orignally tried updating from the web it downloaded the script and failed. The workaround was to download the package to the root directory, delete the original upgrade script, and run it again.