is it causing you a problem?
I'm also interested on if you are seeing any sort of unexpected behaviour. The # sign in the new style URLs are used for our new version 9 Tableau Server UI experience, but aren't necessary when seeing embedded views (for obvious reasons).
This is a similar reason to why the "Share" URLs are also formatted this way.
If the link you provided is not working the way you want, then I would be interested to know what you're seeing and if we can help.