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Google Oauth setup can sometimes not progress to the next step.
Background images not working and other issues related to embedded images when composing email .
Various security fixes.
Crash due to incompatibility with McAfee Anti-SPAM add-on. Workaround: Start in safe mode and disable McAfee Anti-Spam Extension.
Crash when compacting IMAP folder.
Some attachments can't be opened or saved if the message body is empty.
Large number of blank pages being printed under certain circumstances. To fix this problem, remove all printer specific preferences in the configuration editor.
Unable to load full message via POP if message was downloaded partially (or only headers) before.
Large attachments may not be shown or saved correctly if the message is stored in an IMAP folder which is not synchronized for offline use. Workaround: Set preference browser.cache.memory.max_entry_size to the value of -1 (unlimited) and create integer preference browser.cache.memory.capacity with the value of 200000 (200 MB, 25 MB per message).