After playing around with this, it seems that tagging with Wavpack is causing gmb's problem in adding it to library. If I open the file from nautilus and select play in gmb then it plays just fine.
I ripped the cd again in flac and the tagging worked perfectly (Using asunder as I did with wavpack) and gmb picked it up instantly. Not sure why there are tagging issues with wavpack but flac works well.
I ripped the cd again in flac and the tagging worked perfectly (Using asunder as I did with wavpack) and gmb picked it up instantly. Not sure why there are tagging issues with wavpack but flac works well.