Why in SW2015 does it not show a thumbnail preview of a part when you hover over the part icon on the BOM in a drawing?

I've noticed this problem shortly after upgrading to 2015 a few weeks ago and I can't seem to find anything in any settings to change this option?

Has anyone seen this and maybe found a sollution?

Any help would be greatly appreciated!

Thanx alot,

Charles

SolidworksDrawings And Detailing