[Bug 12982] New: MP3tag - <keep> value not set if multiple fields selected

http://bugs.winehq.org/show_bug.cgi?id=12982

Summary: MP3tag - <keep> value not set if multiple fields
                    selected
           Product: Wine
           Version: 0.9.61.
          Platform: PC-x86-64
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

When multiple tracks are selected, any fields in the tag panel that are not
common to all tracks should automatically change to "<keep>", i.e. don't update
this value.

Under Wine, this does not happen.

This is a major usability pain because it results in the tags in the selected
tracks being over-written.

Currently using Mp3Tag 2.41, although I have seen the same behaviour in earlier
versions of both Mp3Tag and Wine.