(11-04-2015 12:53)qblack Wrote: Yes, I'm on a Mac.
I think I've found the source of the problem: the way the Finder handles certain text in the Clipboard.
What I've been doing for some time (and this was to ensure consistency) is to press Cmd-C (copy) on a folder in the Finder which corresponds to the required Composer. It's there from discs already ripped. I then paste into the tag field (either in XLD, Yate or my own Applescript). In each case, the pasted name looks correct.
I have tested this now and see that it is only the above method that generates the 'combination' accent forms you describe above. I can make iTunes generate the same form in its m4a files by pasting a "folder" from the Finder with the appropriate diacritics in its name into a tag field.
I can avoid the problem by inserting the desired characters into a field the long way by using the Character Viewer or (in the case of simple accents) using the Mac's press-and-hold method.
The reason we've been looking at Dvořák is because the ř is more finicky to insert via the Character Viewer, so I was copying and pasting from the Finder. But this shortcut made an invisible change to the name.
Thanks for pointing me in the right direction and showing me that I was, indeed, "doing something wrong"!
Quentin
PS Minimserver rocks!
I'm glad to hear the mystery is solved. I have also learnt something about Unicode "combining" characters.