Still doing it. I did an Import Media, it said "updating thumbnails" for 56,000 files, took about 30 minutes.
Quit MC11.
Restarted it. Did an Import Media again, same behaviour.
Media Center Registered 11.0.232 -- C:\Program Files\J River\Media Center 11\
Microsoft Windows XP 5.1 Service Pack 2 (Build 2600)
Intel Pentium 4 3168 MHz MMX / Memory: Total - 1047 MB, Free - 554 MB
Internet Explorer: 6.0.2900.2180 / ComCtl32.dll: 5.82 (xpsp_sp2_rtm.040803-2158) / Shlwapi.dll: 6.00.2900.2573 (xpsp_sp2_gdr.041130-1729) / Shell32.dll: 6.00.2900.2578 (xpsp_sp2_gdr.041130-1729) / wnaspi32.dll: 4.71 (0002) , ASPI for Win32 (95/NT) DLL, Copyright © 1989-2002 Adaptec, Inc. / Aspi32.sys: 4.71 (0002)
Ripping / Drive D: Mode:Normal Type:Auto Speed:Max
Drive E: Mode:Normal Type:Auto Speed:Max
Digital playback: Yes / Use YADB: Yes / Get cover art: No / Calc replay gain: Yes / Copy volume: 32767
Eject after ripping: Yes / Play sound after ripping: No
Burning / Drive D: PLEXTOR DVDR PX-716A Addr: 1:0:0 Speed:16 MaxSpeed:48 BurnProof:Yes
Test mode: No / Eject after writing: Yes / Direct decoding: No / Write CD-Text: Yes
Use playback settings: Yes / Normalization: None