getting logged out of DUC?

[musicman691]

Have an issue that cropped up earlier this week. I'm using Firefox26 on a mid-2010 Mac Mini running OSX 10.6.8 to access the web and other stuff. I like to stay logged in to the DUC even when I quit FF - makes it easier when I get email notifications and I can just click on the email link and be ready to go when the DUC page opens up. About mid-week I did my usual (downloaded email, checked message, clicked on one for the DUC) and I had to log back in to the DUC. Figured this was an error on my part somehow; checked setting in FF and I do not have it set to clear any logins when quitting. I toggled the setting both ways and the same thing - always have to log back in.

I seem to remember this happened sometime back but it cleared itself up. Anybody else having this kind of issue? Nothing has changed on this system that I can see.

edit for additional:
Happens in Safari as well but I hate Safari.