I downloaded Gspotv2.1 and ran it. On the right side it said,
"S-Mpeg 4 version 3" is the codec and the status said, "Codec IS installed (details)" I clicked this tab and it said, "No Details Available." Directly below was the Audio format. It said that that codec is installed as well. But when I clicked, ""Codec IS installed (details)" there it showed details!
I don't know if this is significant or not.