Stable Kontact client for Kolab3

[Kolab Users]

Hi,

We've been testing the latest Kontact client on Windows, experimental 
from July 2012 seems to be the only client available? this release is 
quite buggy, crashes constantly and deletes IMAP folders at whim (thank 
goodness for backups).

It looks good but is quite unstable and unusable. Any ideas if Kontact 
for Windows is still being developed?

Currently testing with Thunderbird and Lightning and it's quite stable 
and fast, but that doesn't seem as feature packed as Kontact.

Regards,

Michael.