Some of us are having issues ripping CDs with K3B, or even via the file manager on our KDE 4.2-only systems.
My suggestion is to use Audex, which is a simple but effective CD ripper for KDE4. It does everything most folks would want, has a good “wizard” at first launch to set things up, and appears to be a native KDE application.
I like easy selection of FLAC or three levels of MP3 quality: mobile,good and perfect.
It is available from the Build Service. Search for “Audex” and click on the One-Click installer.