Custom tag not mapping

[MDE]

I have a custom tag SONG that I want to map onto Title in Muso. I set this up in options, but it won't over-write the existing Title. I can map Song to a custom tag, but not to Title. Happy to provide more details. It's not a huge deal, as the only difference is that I have set up Title to include Composer in brackets at the end (for popular and compilation albums), which is duplication in the Muso display, but it is unexpected.
Also, BTW, Genre is mis-spelled Ganre in the drop-down box on the right.

[musoware]

Thanks for the typo report - will correct. Are you importing your SONG custom tag thru LMS via the Custom Tag plugin, or directly from a filescan? Also what tag encoding is being used - id3v2 or flac?
EDIT: Never mind, found it already, for some reason I missed off Title in the list of fields to check in code (the only one I missed) - so well done for finding that!

[musoware]

Have just issued a new build (patch) to 1.5.21 to address this - so if you've already downloaded 1.5.21 please do so again.

[MDE]

That seems to work now, thanks.