given two lists on a mailman instance, foo and bar, each with a list passsword the same as the name. login to one, save the password in firefox, go to the other's admindb and it will fail - wrong password. login and ask firefox to remember it and it resets the password saved for the list foo.
This is annoying :) I suspect you are using the same field and form names - while I don't know what the heuristic ff uses for html auth field detection, its certainly assuming its the *same* password.
One hack that might be elegant and work would be a hidden field called username set to the list name :)
Another would be just changing things to ff thinks its a different password and stores it differently.
I'd *really* love a fix that can be backported to 2.1.8 which our list servers are running.