Album art not displaying on lock screen

[MooPenguin32]

I have an iPhone 3GS running iOS 4.2.1. After updating, I noticed that the album art of the song or podcast that is playing does not display on the lock screen like it used to. After searching on the web, restarting your phone is supposed to temporarily take care of it until you sync new music. However, after doing that, I am still experiencing this issue.

While it is not the end of the world, I was wondering if anyone else encountered this and if they know of a fix.

Thanks!

 

[MooPenguin32]

After playing something after the restart, my album artwork did appear. However, I'm still curious if others have experienced this.