Sitefinity CMS has a built-in WYSIWYG page editor. WYSIWYG is an acronym for What You See Is What You Get. This term is used to describe a system in which content displayed during editing looks similar (if not identical) to the final output
The alternative to WYSIWYG page editing is a sandboxed composition mode where content looks nothing like the final results. In this environment, editors must constantly toggle into a preview mode to see the results of content changes. Sitefinity deliberately choose a WYSIWYG editing experience to minimize the steps (and pain) needed to edit, preview & publish content changes.
However, to create an accurate representation of the final page Sitefinity needs to execute the controls & code used on the page. In some circumstances, this can create problems. Thankfully there is an easy solution to this problem.
A few weekends ago during the WAM2010 charity ...