Google Music Manger issue with .ogg file?

Had a very head scratching issue with the (at least the) Linux version of Goggle Music Manger. GMM claims to have uploaded all of the songs and produced some errors on some individual song titles. I didn't think much of the errors since the upload showed successful. I then went to the Google Play page to take the next step of creating some play lists. To my surprise, I only had the original group of files I uploaded a while back and the recently purchased songs from Google (practically a) give-way of albums from last week. I went back to look at the errors noted by Google Music Manager and deleted from disk the files that were named in the errors. I was left with a single error from the "Run Troubleshooter" option; and the error listed that had no filename and a error with just "Failed to upload". Kinda odd to find no filename... Finally noticed that after hitting "Apply" and "Ok" I saw a "0%" on a Al DiMeola song and went searching for it. Immediately after moving the file from the original disk location on my system, Google Music Manger had a little green icon turn on and Google Play began to see the songs. That Al DiMeola song was an otherwise legit and playable .ogg file. I can only suspect that GMM does not like OGG files at this point, but doesn't want to ignore them. Hope my pain is your gain with Google Music Manager.