Dear Thomas.
Sorry to report that Preview is broken in Flash9 in version 2a.
Please let me know, if you wish examples of this problem. ( Mac Version)
Update:
I have just tested Version 2.0 beta 2a
Revision 556/4.3.2. ( The one called 2b in the .dmg file.)
No luck with preview in flash 9
Regards Birger.