Seesmic opens, but won't load tweets

HP Pavilion running Vista Home Premium, 64-bit. After a Windows update and a Norton Internet Security update, existing Adobe Air applications--Tweetdeck and Seesmic Desktop--will not open.

Have uninstalled, then reinstalled Air, Tweetdeck and Seesmic. Still not working.

Seesmic opens the configure box, accounts are listed, but no passwords saved. When I add passwords and click SAVE, the configure box closes. When I reopen the configure box and check settings, the passwords have not saved.

Tweetdeck opens only to an empty frame, no account data loads.

I believe this is an Air issue, because both of these applications went bad at the same time and both of them employ Air for the connection to web/API.

I have since installed Twhirl, which is working perfectly, which tells me that Air is installed correctly.

Something happened to the Air settings during the updates. I think it's an Adobe Air problem, but no one from Adobe support forums has offered help. Does anyone have experience with this bug?