First, there are some user-visible changes against the latest version, most notably the much improved message editor. This is still work in progress and the next release should add the sorely missed cut and paste support which only recently became functional in the underlying wxGTK toolkit. Also, configurability has been much extended. For the first time, Mahogany now defaults to collecting all mail from the system's INBOX (whatever that is) to a central ``New Mail'' folder. It can easily be set up to watch any number of different mail accounts or newsgroups and collect mail from them.
This release got a bit delayed because we decided to finish some long planned changes under the hood, mainly a complete rewrite of the internal configuration system which now provides the inheriting configuration settings we had planned, something that will become obvious in the next release when full GUI support for it will be added. Also, we seriously improved the mailfolder handling code to reliably handle all kinds of error conditions, such as modified or disappearing mailboxes or terminated connections and recover from them safely. Also, Mahogany now has full working support for IMAP, NNTP and newsspools.
Apart from this there were many minor fixes and changes, both GUI and mail code, documented in detail at the end of the TODO file.