I'm suffering the 'misnamed files' problem with 8. 1. 1 . . actually what happens is the same MP3 temp file seems to get used 3 or 4 or even more times (with a different name each time). Looking at the temp folder it seems Pandora sends two files with almost identical times to start with (this is in the /plugtmp folder), which is a confusing start, and PJar never recovers. The temp files don't ever seem to go away either, so right now there are 5 there, with PJar picking one seemingly at random. This is less temp files than there should be, since Pandora has now played 7 tracks.
Wot a pickle. 8>.
By the way, looking at the code (briefly) I don't believe all . mp3 files contain 'LAME' (there are a few other encoders out there).