If I remember correctly, Ubuntu uses Debian Sid's packages, which are
generally outdated with regards to GNUstep. They were updated a few
months
ago, but since the most resent release it's now outdated. Other
packages,
including GWorkspace, GNUMail and others are also outdated.
Unfortunately,
the best way to get GNUstep packages for most distributions is still
to
compile it yourself. Fortunately, compiling GNUstep based program is
quite
a bit easier than others (no need for ./configure, except on core
libraries). I'm not sure who makes the Debian packages, but I assume
he
reads this mailing list and could explain why they have yet to be
upgraded
(keep in mind it's hard to get packages included in the official
Debian
distribution, but should be easier with the new -make).