


If you backed up your profile beforehand try replacing the cert8.db and Ke圓.db files in your profile with the ones from your backup. The bug(s) modifies your profile to say you have a master password, and does it in a way that prevents you from resetting the master password normally. There are several bugs in the upgrade code that cause this, with slightly different symptoms.

Your passwords are stored in a different file in 3.0.You can't delete it except by editing prefs.js. It may create a smart folder account (due to having used smart folders in 3.0) that gradually corrupts folder listings.It is strongly recommended that you backup your profile before upgrading to 3.0.If you are using Kaspersky antivirus and have blank windows after you upgrade see Kaspersky causing blank window problems with Thunderbird 3 upgrade.If it doesn't work correctly you can either disable or uninstall it (from Safe Mode if necessary). If you can't update an add-on it will frequently work if you disable version checking per Updating add-ons.If it uses too many resources you can disable it in Tools -> Options -> Advanced -> General -> Advanced Configuration -> Enable Global Search and Indexer. Some users have also reported that the size of the profile keeps growing even after it had enough time to index all of the messages. This can vary greatly depending upon the size and type of messages you receive. In v3.0 one person's testing shows an average of 3.5 KB needed per message. This feature is still buggy, and the the index for global search requires substantial disk space. If you enable Global Search/Indexing information about every message in every account (except News) is stored in an SQLite database.
