kde-4.2.0 kmail_part toolbar disapeared in kontact

[Alexey Tyapkin]

Hello All,
I noticed that kmail_part toolbar disapeared in kontact. After I'd
upgraded kde to 4.2.0.
Does anybody know what to do with this issue?

P.S.:
$ dpkg-query -l "kontact*" | grep ii
ii  kontact
4:4.2.0-0ubuntu1~intrepid~ppa3              KDE pim application
$ dpkg-query -l "kmail*" | grep ii
ii  kmail
4:4.2.0-0ubuntu1~intrepid~ppa3              KDE Email client