Tried it with fullscreen as well but does nothingYikes! I did not notice that grey screen before. Have you tried playing the game in full screen? hopefully the dev's can look into it.
Odd, I only have the loose lua patch and additional cheats mod installed. These bugs still occurs even with the backup file provided (separately). My working theory is Spearsoft must have changed something inside misc.vpp_pc for the Steam release. This appears to be happening for Admixion as well. Cytrxho (the person below the post I linked) seems to be experiencing it too on the GOG release too.The buggy icons and grey box happen to me when I install sandbox+, didn't happen with the EGS version