I just imported the fusionchart module into a new 4.5.2 project, then exported it as an .mpk. Next I opened my MX 5 Beta 8.0 and imported the .mpk file. I first got the "Loading. voortgang" screen but this was solved by disabling security so I atleast know this is a security configuration.
In short, all the example charts are working fine in the MX 5 Beta 8 release.