Hi Vic
I think you have a corrupted FCPX install, could be wrong.
Assuming you tried all of the tips in the Richard Taylor article and the fact that you did a clean install of Yosemite…
Here is what I would do…
Check other crash reports and see if crash is occurring for same process/event Ozone Framework (I think this is specific to FCPX and not a shared framework component, sorry lack of time for tracking down specifics; perhaps Tom W can help here, Thanks TW)
Archive the crash reports and then clear logs/delete them. (Just house keeping) Wonder where other crash reports are??
Uninstall FCPX using a 3rd party uninstaller that removes all components. This is important as sometimes simply dragging the app icon or right clicking and "Move to Trash" may not remove all the bits and pieces of the program. Un-installers like App Cleaner; TrashMe; or FCS Remover should remove all the files associated with the program.
(note: I typically use Terminal, but the Remove (rm) command is potentially dangerous, so I don't recommend this approach unless you are comfortable with Terminal.)
What we want is to make sure that the potentially corrupted framework(s)/components are removed/replaced with new code.
Delete FCPX from the Downloads folder, Important because the system may just re-install the corrupted previous download.
Empty Trash
Use Disk Utility or I prefer Onyx to fix permissions.
Re-download FCPX from the App Store (Note you may need to use the Option Key to redownload)
After installation is complete, repair permissions again. Really I always try to fix permissions prior to and after software/OS installs/updates.
Open FCPX, do not install any plug-ins, use different media and see if problems persist.
If they do, definitely make an appointment with the Genius Bar!! Make back-ups!
Let us know what happens.
FYI, I have several out of town family members and guests here for a friends wedding, so will not be available for several days. Don't want you to feel abandoned. We may be nearing the limits of my abilities anyway. If Tom W is still following, he may have some additional ideas, good guy Tom! Very helpful!
Best regards, may you only experience Happy Editing from here on🙂
Hope this helps, Greg