I'm using Thunderbird 0.5 for OSX. Just today my complete "Inbox" folder seems empty. This happened to just one of the two accounts I work with. The other one is ok.
When I use the "Search Messages" function the mails are found in the folder "inbox". I can move them to a different folder from the search window.
the msf file is the index file made by thunderbird. all the actual emails are stored in the file without extension. probably the msf file of your inbox got corrupted and thus unreadable and hunderbird didnt display any mail. by deleting it you force thunderbrid to recreate an idnex file of your mail and thus it could read the enw index again and show your mail.
I have been having some problems with email not being displayed - even though when you do a search, it comes up no problem... What I have found was that if you resize the email listing box (along it's bottom edge), all the email messages are refreshed - correctly.
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