Puzzled by comments

[mike-shand]

I'm trying to write a tag that will appears as "comments" in iTunes.
I've tried $TagData['comment'][] = 'My comment';

That sets the V1 comment OK, but it doesn't set the 'comments' field that iTunes it looking for. Indeed it often appears as a corrupt string.

So how do I set tag data (in an MP3) that iTunes will recognise as comments?

Mike