Encoding the Incubus album "Morning View" proved once again that the Xing engine sucks. Try the beginning of the song "Blood on the Ground", encoded with 96 kbit... I use RealJukebox V2, by the way. It has a newer Xing build than V1.
The song sounds like encoded with a modem bitrate codec
It must be related to the stereo effects used in the sample. As soon as the vocals start on the right speaker, the guitar on the left speaker gets completely messed up. And completely I mean.
Would be interesting to explore at what bitrates the same engine starts to perform better on this particular song... and whether other engines (Lame, Fraunhofer) have similar problems.