no MP3 Decoder plugin

I tried the svn and I got farther. :-)
I don't need mp3 but the program quits unless I have it (even the do not 
show again checkbox doesn't bypass it).
What is the file name of the MP3 Decoder plugin?


MP3 Audio Decoder plugin not found.
K3b could not load or find the MP3 decoder plugin. This means that you 
will not be able to create Audio CDs from MP3 files. Many Linux 
distributions do not include MP3 support for legal reasons.
Solution: To enable MP3 support, please install the MAD MP3 decoding 
library as well as the K3b MAD MP3 decoder plugin (the latter may 
already be installed but not functional due to the missing libmad). Some 
distributions allow installation of MP3 support via an online update tool.

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