[bsoriano]

"However, it would not work well on a folder where all of the items are either from different tv shows, or are different movies, or music videos."

That is a very good point, in which case, displaying the default background is probably the best choice.  Browsing within the seasons and episodes of a particular tv show and suddenly seeing a random fanart from an entirely different tv show appear momentarily when you enter a subfolder (and the ".." parent folder item is highlighted by default) feels somewhat jarring and unusual, but the momentary appearence of a generic default background until the user moves the cursor would probably make for the best user experience.

@Variable! , the changes are already on GitHub.

Regards,

Bart