We're getting the "Potentially dangerous Request.Form value was detected from the client" during postback of edited page (the WYSIWYG mode, not in the editor mode). This must be a common issue, mustn't it? I think I understand why it happens, and I am surprised that the only solution we're given (in this forum) is to turn off event validation. It's not an option. We're running CMS 6 with .NET 4.0. Maybe it's got something to do with this?