I have the lucid android.
I place the music from my computer in media player on my sd card and a lot of my music won't show up. I looked at the file types and I don't think it's a problem with them (but what do I know?)
Also it will put certain artists in the unknown or various artists folder thing when on my computer all the information is there. I downloaded an app called sdrescan but it didn't help.
Also, a little side question about apps, I tried to delete some of the extra apps my phone came with (like amazon, imdb, etc.) and my phone said that if i deleted them my phone may not work properly. Is that true?