I installed Custom Sidebars Pro. It seemed to be doing ok for a while. I have added about 18 custom sidebars. The plug-in has become extremely slow. Also, the content in the sidebars is completely mixed up now. The sidebars seem to be randomly showing content from the different sidebars.
I thought today that maybe I had not saved some of the sidebars properly. Today, I went back and re-entered the content for each sidebar. It seems to initially work, but after I edit another sidebar, the content in the other sidebars get completely mixed up.