|Well ... hmmm ... I found that:
Kmail and kaddressbook are in a difficult position for 4.4. kaddressbook
has been converted over to the new akonadi framework, while kmail has not
yet been. The kmail akonadi switch was originally targeted at 4.5, which
would have been assumed to be 4.5.0, but the kdepim folks (rightly, IMO)
don't want to be responsible for another kde 4.0 level mess, so have been
quite cautious about releasing code that they don't believe is ready for
mass usage, and have decided the kmail akonadi code isn't likely to be
ready for 4.5.0, so they're planning on switching with 4.5.1, roughly a
month later, as of the last kdeplanet blog information I had (I haven't
read today's kdeplanet feed yet).
Funny: it's the third Debian Stable release which will have broken features which I use regularily.
Etch: Nikon Raw Format broken in digikam/showfoto (showstopper)
Lenny: no Wikipedia connection in amarok
Squeeze: distribution lists more or less broken in kmail (showstopper)
Do I have to say, I don't like stable releases?