In trying to enter a custom project folder in project settings, it appears that checking the box causes the window to go from grey on white to white on white. My work-around is to click in the path entry window, hit <END>, hit <BACKSPACE> until the cursor is at the left side of the window. Type in the pathway, uncheck the option box to check the spelling, etc., re-check the box and <APPLY> or <OK> as needed.

Has anyone else seen this problem?

The render output file name has the same "white on white" problem, although drilling down to the destination works reliably.