After editing a wiki page using SharePoint Designer 2010 I have stared to get the message "Content in the embedded form field maybe changed by the server to remove unsafe content. Do you want to reload the page to see the results of the save?"
I get this error even on a empty/new wiki page so I guess it is a warning that always appear? Some user find it a bit irritating.
Anyhow...sometimes content are removed. "target=_top" seems to be unsafe and sometimes href's are removed too. What is the definition of unsafe content? Why is target=top unsafe? Sharepoint Designer removing content users might have spent hours on is not a great feature IMO. Maybe I've missed something. (It happends all the time :-)