I just figured out the difference between files whose tags will be read and files whose tags won't be read. Using foobar2000 I discovered that the tags of files that are read, look like this:
TITLE = ********
DATE = ****
TRACKNUMBER = ***
MEDIA JUKEBOX METADATA =
<MPL Version="1.0">
<Item>
<ExInfo ReplayGain="1|0|-1|0|0|" Rating="0"/>
</Item>
</MPL>
ARTIST = ***
ALBUM = ****
GENRE = ****
Files whose tags will not be read:
DATE = **
TRACKNUMBER = **
ARTIST = ***
TOOL VERSION = 9.0.98
GENRE = ***
TOOL NAME = Media Center
ALBUM = ****
TITLE = *****
In both cases the tag information exists, just in different forms. I can find no correlation between the date the files were created or the version -3.97 vs 3.92 (contrary to what I had originally thought)- and whether or not the tags are read.
Any ideas would be greatly appreciated
Oh... to answer your question, all files were created using MJ, so there should not be any version 2 files.
Mikey