Evolution 2.5.1 and EDS 1.5.1 are available for download:

Amidst lots of rains, floods and hot coffee comes the first release
of Evolution in the 2.5.x cycle. You can download the following :

http://ftp.acc.umu.se/pub/gnome/sources/evolution/2.5/evolution-2.5.1.tar.bz2
http://ftp.acc.umu.se/pub/gnome/sources/evolution-data-server/1.5/evolution-data-server-1.5.1.tar.bz2
http://ftp.acc.umu.se/pub/gnome/sources/evolution-exchange/2.5/evolution-exchange-2.5.1.tar.bz2
http://ftp.acc.umu.se/pub/gnome/sources/gtkhtml/3.9/gtkhtml-3.9.1.tar.bz2
http://ftp.acc.umu.se/pub/gnome/sources/libsoup/2.2/libsoup-2.2.6.1.tar.bz2

Upgrade Notes :
Evolution 2.5 is the unstable series of 2.6 development.

New this release :

Memos component (Nathan Owens) and plenty of bug fixes.

Reporting Bugs

If you have problems with 2.5.1, please take the time to submit the bug using Bug Buddy or at http://bugzilla.gnome.org. Try to fill in as much detail as you can regarding the circumstances that lead to the problem.

If you have a feature request, you can also file that at http://bugzilla.gnome.org/ don't be discouraged if you don't hear from us right away, we get hundreds of feature requests a year.

You can also check if your bug has been reported before by using the search functionality of Bugzilla.

More information is available at the project website
http://www.gnome.org/projects/evolution and the project wiki :
http://go-evolution.org/