When I display the contents of a music folder with details (title, album, genre, bitrate, etc.) the mp3's which have a Indie genre appear as bIndie[/b]. Why?
This is the only genre that appears like that. Is that a bug?
My bet is that whatever wrote the tags did so in an unusual (and probably non-standard but I'm no expert) way.
ID3v2 genre tags should either be a string with the genre name, e.g. "Indie", or a string with a number in brackets which refers to the list of pre-defined ID3v1 genres, e.g. "(131)". Using both seems odd to me.
I would use whatever your favourite tag editor is to re-write the tags on the files and the problem will probably go away.
That said, it seems you are not alone (and Opus is not the only program affected) in seeing this, so maybe the Opus MP3.dll should be updated to handle the case where both a number and a string are provided (instead of one or the other). I don't understand the reason being writing tags in that way but we can't change that.
That thread says that Winamp ignores the number in brackets and displays the string after it in cases where both are used. (We just have to hope there isn't actually a genre called (123)Blah one day as it would be displayed as Blah. )