Today, when I try a One Step Update (OSU), it takes a long time (> 5 minutes) to finish (using about half my CPU) and gives me CC-501 errors ("we are unable to update this account due to an unknown error") on every one of my accounts at every financial institution.
EDIT: I tried 2 different Quicken accounts and a grand total of one FI managed a download (Morgan Stanley). All other FIs (Bank of America, Chase, USAA, NFCU and Schwab) in my 3 Quicken account sets failed.