I've been finding artists doubled up in my library lately. Say, scroll down and I find two Jimi Hendrix listed. for one, all the artist attributes have a long line of spaces after the name. a pain, obviously. my guess is that this happened when my library was converted for 9. could be importing though, too. or maybe you already know what it is. but i thought i'd tell you anyway.
Media Jukebox PLUS 9.0.84 -- C:\Program Files\J River\Media Jukebox\
Microsoft Windows XP Workstation 5.1 (Build 2600)
Intel Pentium III 597 MHz MMX / Memory: Total - 196 MB, Free - 60 MB
Internet Explorer: 6.0.2800.1106 / ComCtl32.dll: 6.00.2600.0000 / Shlwapi.dll: 6.00.2800.1106
Shell32.dll: 6.00.2600.0000 / wnaspi32.dll: Internal ASPI Layer
Ripping / Drive D: Copy mode:ModeSecure CD Type:ASPI Read speed:Max
Drive E: Copy mode:ModeSecure CD Type:ASPI Read speed:Max
Digital playback: Yes / Use YADB: Yes / Get cover art: Yes / Calc replay gain: No / Copy volume: 32767
Eject after ripping: Yes / Play sound after ripping: Yes Soundfile: chord.wav
Burning / Drive D: HP CD-WRITER+ 8200 Addr: 2:0:0 Speed:4 MaxSpeed:4 Lib:2 GHS:1 Use MJ Engine:No
Test mode: No / Eject after writing: Yes / Direct decoding: Yes / Two second gap: No / Write CD-Text: No
Use playback settings: No / Normalization: None