Minor UI issue, but on the digital signature page, the selection of certificates, etc. should be disabled if the 'Enable digital Signing' is unchecked. I just wen't back and forth with a customer for a bit trying to figure out why the digital signing wasn't sticking right as I had selected the certificate and options, etc. Then I realized I hadn't checked the 'Enable' box.
Dumb thing on my part, but it would be nice if the UI notified you by disabling options until you enable signing...