Comment 16 for bug 447888

Please see the comment from Matthew Barnes @ https://bugzilla.gnome.org/show_bug.cgi?id=604398#c10
This is already fixed in Evolution 2.29. Since Lucid Lynx is bundled with 2.28.2-1ubuntu2, the fix is not there.
2.28.3 should have it incorporated but, as Matthew says,

> Sometime soon -- I haven't decided exactly when yet -- we'll be releasing an
> unscheduled Evolution 2.28.3 which will include this fix among others. In the
> meantime distro maintainers can grab it for themselves.