Image rendering issues - pink around plants in vector views

[BSRD]

I have just purchased a brand new computer with tons of memory and a non-integrated graphics card.
It renders in the blink of an eye, but, my tree images in the 3d vector views still have a pink box around them just like on the old computer.
Previously, I was told that this was probably due to my inadequate graphics card. But this shouldn't be the case with the new computer.
I am using HDPro 7.

Any other ideas?
Barbara