tags in mp3 files are showing wrong in explorer and Media Player

they have to be re-indexed.. simplest way is to rename the files using mp3tag

Probably the MP3 ID v1 tag differs from the v2.3 one. You should see that in mp3tag by opening the properties of a file showing a difference.

Thanks for your answers.
I tried renaming the files, but it did not fix the problem.
In properties in mp3tag, it says that the tags are ID3v2.3. The tags are showing correctly in the properties.
In parentheses next to the tag version, it says (ID3v1 ID3v2.3).
Any ideas?

Please check the info below.

According to Stanman, it says:-

"In Mp3tag look at the Tag column for some of the files. If it says ID3v2.4 (ID3v2.4) they won't show up in Windows Explorer because Windows Explorer doesn't support ID3v2.4 tags, just ID3v2.3 and ID3v1.

In Mp3tag Options > Tags > Mpeg make sure under "Write" the box "ID3v2" is checked and underneath "ID3v2.3 UTF-16". Then when you save the tags it will convert ID3v2.4 to ID3v2.3."

Source: http://forums.mp3tag.de/lofiversion/index.php/t14008.html

They all say this under tag:
ID3v2.3 (ID3v1 ID3v2.3)

The correct boxes are checked in the tag options.

Any other ideas?

It is a known issue of win 7 but no definite fix so far.

Fix 1:

I had this problem - everything looked fine in mp3tag, but Windows 7 Explorer (and WMP 12) had problems with the tags in a few files. I found a free program that looks at mp3 files and "validates" them. Sure enough, it found problems in the same files. But all you have to do is click "Fix" and then you can edit the tags and all the programs are happy. Nice program:

http://mp3val.sourceforge.net/

OR

Fix 2

Let foobar2000 override the id3v2.3

Source:  http://forums.mp3tag.de/lofiversion/index.php/t11803.html

Hmm..
I ran the mp3val program, it found errors in each file and 'fixed' them. But the problem is still there.
I installed foobar, and opened the files, and the tags show correctly. Is there a way to 'save' them or something?
In an interesting note: one of the tracks has the wrong track number of 8. I went to mp3tag, and deleted the track number. I went back to explorer, and saw that it no longer had a track number. Then I went back to mp3tag, put in 010 (which is the correct number), and when I went back to explorer, it said 8 again! Weird!

Which version of mp3tag?

Do you think that mp3tag is buggy on 64 bit win 7?

It seems to me that mp3tag cannot write to the tag of the OS file system as it just create an additional layer of tag which the OS cannot read.

It's the newest version of mp3tag - I just updated it a few days ago.
Maybe it is buggy? I am using 64bit windows 7.
I've had no problems with mp3tag in the past couple years that I've been using it, and at least a year that I've been using it with this computer.
???????????

Wow - I don't believe it! I left off the zeros, and the track numbers are now displaying correctly.
Thanks!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

It's strange, there is no reason for treating track numbers as something different than decimal values, or just strings ...

I know. Well, at least it works now. Thanks!