Can anybody confirm bug in 2.48 re: Preview Mat?

I’m not sure if it is a bug or not. My little square that shows the preview of my material in the button’s window is suddenly all faded out and over lit. This just started with the recent release of 2.48. Can anybody confirm?

Thanks.

would be easier to look at it

but i did not noticed any problem with this preview pane!

Salutations