I have about 20 modules installed on my system and SIMGallery is the ONLY one that gives me this problem. All my buttons are blank. Can you fix this?

Look at the pictures. Half the SIMGallery buttons are blank. SIMGallery works great, and I have everything configured perfectly (the way I want). The only problem is that the SIMGallery buttons are white on the front-end. I have 20 other components installed, and SIMGallery is the ONLY component that has this problem.