Version:            (using KDE 4.3.3)
Compiler:          GCC 4.4.2 
OS:                Linux
Installed from:    Gentoo Packages

I have just upgraded from KDE 4.3.2 to KDE 4.3.3. I have noticed the following regression:

I always want to use KMail standalone. But in some cases, when a KMail window needs to open, a  ontact windows opens instead. This happens when:

1) KDE starts up, and KMail tries to check mail on startup. In 4.3.2, there would be no other window except a KWallet prompt, which KMail uses to fetch new messages. In 4.3.3, both Kontact and KWallet come up.
2) I open a mail message. Together with the message window, a Kontact window opens. This happens only once per session, further opening of message windows does not open Kontact.
3) The same behavior as in 2) when composing a new message.