Have you changed the size of the page/pages in admin panel builders? The default page width is something like 960px. I noticed a similar situation when I had reduced the default 960px to a smaller width. When it's left alone at the standard it seemed to display, when reduced it didn't. I had to edit the css file and change some widths in /templates/yourtemplate/css/sdating.css

A few others I had some issues with when reducing px too were classifieds and blogs maybe another I forget off hand, but see more I did edit blogs_common.css classifieds_view.css general.css profile_view.css sdating.css and a few minor changes to base/css/cmts.css because firefox and ie display comments area slightly different.