Of course, everything was working fine until I wanted to make a change. My standard productPage.inc was the original and showing two columns of products with a setting of 6 products per page. I did have some categories that had their own product layout with only one column. I was making a "small change" to open the picture in a new window when clicking on the picture to show it as a larger image. All went well on my custom layouts, but started having problems when modifying the "standard" of productPage.inc. Now, it only shows those categories in one column as well. Even getting a "restored" version of the file has no effect.
Thanks in advance.