Interesting issue, don't know if it's a bug or not... I have some very large ASF video files that I'm trying to play. The files are 120-140MB in size. When I d-click on the files in Explorer MJ will play about the first 3 seconds and then locks up. If I drag the files to the Playing Now window and try to play that way, MJ just buffers and then locks up. One interesting thing is that there is a little red note next to the asf file in Playing Now versus an MPEG movie that has the little speaker icon.
Media Jukebox PLUS 8.0.309
Install Path: C:\Program Files\J River\Media Jukebox\
CPU: AMD Athlon 1395 MHz MMX
Memory: Total - 523 MB, Free - 350 MB
OS: Microsoft Windows XP Workstation 5.1 (Build 2600)
Internet Explorer: 6.0.2600.0000
ComCtl32.dll: 6.00.2600.0000
Shlwapi.dll: 6.00.2600.0000
Shell32.dll: 6.00.2600.0000
wnaspi32.dll: 4.57 (1008) , ASPI for Win32 (95/NT) DLL, Copyright © 1989-1997 Adaptec, Inc.
Aspi32.sys: 4.57 (1008)