Grid view cover not displaying on mojo

Well, if you have the SMP you are in the wrong forum anyway.  The thread for the MOJO for the SMP is here:

http://community.wdc.com/t5/WD-TV-Live-Streaming-Discussions/Mojo-for-the-SMP-Updated-9-29-12/td-p/287022

If you downloaded the theme from this forum then you downloaded the wrong theme, as it’s for a specific FW on the HUB.  You need to download the theme from the thread I pointed to above.