No, it happens for me too. It'd be fixable in the CSS by changing two lines.

I found the controls for that color region under

main-rollup.css1
.textbox, textarea, select

Change the background color to white and the text color to black.

I suspect it's part of an add-on and not in the forum backend, which will be built to control a vanilla vb forum.

The text that is hidden is just the categories and once you move to the Paypal screen you'd see it there too.