Upgraded to R5 and could no longer one-step update from Citibank although the other accounts worked.
Looked at the packet traffic with ethereal. Clearly a packet (size?) problem or problem with content that NAT doesn't know how to modify. So I (gulp) by-passed my external NAT firewall (praying WinXP firewall would protect me for at least a few minutes) and it worked...went back behind the firewall...didn't work. Deinstalled R5 (which I had allowed to upgrade a week or two ago) and reinstalled from the original pre-R5 CD - everything worked like it used to.
Quicken Support wanted to charge me to tell them about this (the packet traffic and all) but I didn't feel the need to pay for the privilege of reporting the bug, so I'm sending this out for google to index.
RP