X7.1 Build-in reader doesn't display pdf properly

I’m using Macbook Air, OS 10.9.2, ENDNOTE X7.01 BUILD 9257 (and also the latest 9529)

The build-in reader doesn’t display pdf properly. Once you scroll down a pdf, I will always find a large area (the bottom half of the window) showing nothing but gray background. Please fix this!

Attached two screen shot before and after 7.1 build 9529.

I have exactly the same issue -perhaps it is insufficient memory allocation? This needs to be fixed!