To prevent the "Selected encoder was not found" message in KAudioCreator on ripping, do the following.
1. For Ogg Vorbin encoding, simply install the "vorbis-tools" package through synaptic or apt-get, which installs the "oggenc" encoder needed to rip to ogg vorbis.
2. For MP3 encoding, install the "lame" package through synaptic.
3. For FLAC encoding, install the "flac" package from synaptic.