Beta 8 Fusion Macros Cause Crashes

As of beta 8, one of my Fusion macros stored in the Titles folder (so that they show up in the Edit page effects library) causes instant crashes when it's used in a Timeline for one specific project, but not another that was created in beta 7.

[Peter Chamberlain]

Can you revert to b7 and verify its still ok there?
Sounds like a regression we have seen in b8.

Can you revert to b7 and verify its still ok there?
Sounds like a regression we have seen in b8.

To revert do I just uninstall 8 and install 7? Also one project with the exact same template works and another crashes, if that helps.