I also have a Glacier, but have only just found out that it plays ogg files as well, so I haven't had a chance to test it out yet.
The only lyrics I've had on my player was the test file and it was an MP3 file not Ogg.
Here are a couple of sites for you to check to learn a bit more about LRC files. Let me know if you find if Ogg work with LRC files.
cool-lyrics
Power LRC