Running Mozilla 1.0 in WindowsXP, today several subfolders displayed ??? for the number of email messages. I then attempted to check properties, only to see that the Character format said to be Arabic, not Western. Subsequent to that, many sub-folders have disappeared, along with the messages in them. This all happened after I renamed a few folders (say, from "Work" and "Personal" to "1 Work" and "2 Personal" so they would be reordered. I also moved a number of subfolders from one to another.
I attempted to recover the sub folders by deleting the SNM extensions in the email subdirectories, but that did not work. I have 4 years of email here, so the email takes up perhaps 3 GB in total. Any thoughts?
