The Evolution Teamhas released Evolution 2.4.1:

http://ftp.gnome.org/pub/gnome/sources/evolution/2.4/evolution-2.4.1.tar.gz
http://ftp.gnome.org/pub/gnome/sources/evolution-exchange/2.4/evolution-exchange-2.4.1.tar.gz
http://ftp.gnome.org/pub/gnome/sources/evolution-data-server/1.4/evolution-data-server-1.4.1.tar.gz
http://ftp.gnome.org/pub/gnome/sources/gtkhtml/3.8/gtkhtml-3.8.1.tar.gz
http://ftp.gnome.org/pub/gnome/sources/libsoup/2.2/libsoup-2.2.6.tar.gz

Upgrade Notes :
Evolution 2.4.1 is a maintenance release in the stable series of 2.4 development.