Homebrew mode doesn't support anything.
In normal modes you shouldn't see WHITE backgrounds unless something is wrong with the PNGs. Yes, take a picture and describe the problem with particular game in details. If there is no PIC1.PNG and you're viewing a game from INTERNAL HDD then it can happen.
Originally Posted by cbprod
Yes, I'll add an ini option for that tomorrow.
The latest 1.07 version has the background changed and it fits just fine. I guess you didn't try it or didn't see the screenshot on the first page of the thread.
Next minor update will restore SLIDE display mode (with 7 game icons) + covers if available.