How to get high quality thumbnails back?

I updated firmware a few months ago and my thumbnail picture quality went down. I was hoping this new firmware would fix it but nope. Anyone know a trick to getting the higher resolution thumbnail pictures back?

Are you using the Standard Theme or a Custom Theme?  This usually happens when you are using a custom theme, if this the case you may confirm the Firmware version tested with the Theme and try a roll back.

How to roll back the firmware on a WD TV Live Hub Media Center or WD TV Live Streaming Media Player 

Just the standard one with the grass. Can’t figure out how to add a theme yet.