Yay!! I did it! I upgraded both the WordPress core and the theme. The old theme was getting kinda old, and there was a lot of problems with it. Example, it did not support picture captioning, and strikethrough text was buggy. There were a lot more problems than that, so I was only too glad to get rid of it and get a new grunge look. But just for memory’s sake, here’s a snapshot of the old theme, in case you might miss it:
The old Simpress theme