WDTV gen2 preview problem

I recently bought a WD TV HD gen2 and immediatelyt updated its firmware from 1.01.70 to the newest 1.01.77.

The player works very well, but if i change the video preview mode to “preview”, the player stops reproducing files (it shows only the spinning wheel).

If I turn off the player removing power plug and then reboot the WDTV  and restore the preview mode to thumbnail (or detailed list) everything works well again.

Anyone has similar problem?

Thank you (Sorry for my english)

Yeah, and I doubt it’s going to get fixed.