+1 - agreed, this is really frustrating. Sorry, Jesse, the workaround is N/A in my case: I'm using the same webinar token that worked in prior webinars, because I'd cloned the program. I've been using the Rich Text Editor to update the content around the webinar token - haven't even TOUCHED the webinar token. When I closed the edit windows and went to approve. I got the invalid token message because Marketo had added the %20.