Extended Tags and FLAC

I've recently started archiving my CDs to FLAC, and Mp3tag is head and shoulders above anything else available; many thanks Florian for such a great application.

However, I've noticed that the Extended Tags dialogue doesn't quite duplicate the contents of the VORBIS_COMMENT block in the FLAC file, in particular, the 'DATE' field gets shown as 'YEAR', and the 'TRACKNUMBER' field gets shown as 'TRACK' (when compared against the output from metaflac.exe).

Now, I accept that this isn't really a problem, but it would be nice to have an application that allowed the FLAC tags to be shown/edited completely transparently, without trying to rename the fields or change their case. Seems to me that Mp3tag's Extended Tag functionality would be perfect for this...

Any thoughts?