I am attempting to embed a shockwave file in a table on a SharePoint
2010 home page. I have gone through the motions of adding the code to
the table detail, but get a message back from SharePoint designer that
the "Content in the embedded form field may be changed by the server to
remove unsafe content. Do you want to reload your page to see the
results of the save?" When I reload the page, the code has been removed.

Is there some permission to allow embedded content or a different method
of getting this done?