User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.3b) Gecko/20030215 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.3b) Gecko/20030216 I was using 20030215 build. When I upgraded it to 20030216 build, I found that whole mailbox was disappeared. All account data, all inbox data, all localfolder data seems lost. The files were not deleted; but there was nothing displayed in Mail application. It seems like that 0216 build does not comport with older database. I tried to overwrite files in Mail folder with backuped files over newly created files but it failed. Reproducible: Always Steps to Reproduce: 1. Use Moz Mail build 20030215 and create some text 2. Install 20030216 build 3. Launch Mail app Actual Results: Account info and Mail contents are lost Expected Results: Display its own mailbox content

actually, you probably lost your prefs.js, or the mail directory setting in your prefs.js - go look at your prefs.js and see if it still points at your mail directory - there's a bug in the prefs.js code that can cause it to get corrupted/lost. It's not a mail database bug, or even a mail bug at all.

*** Bug 194565 has been marked as a duplicate of this bug. ***

dupe of bug 170539 or bug 183941?

dup'ing *** This bug has been marked as a duplicate of 170539 ***