OS 5.2 is just a developer release for use with the simulator.
One of the very interesting fixes noted in 5.2 is
"Fatal error could occur when 68K callback (serial manager window
handler, procedure alarm, attention manager, notification) is launched while
native ARM application is being run."
This would seem to imply that there is already support for "native ARM"
applications in OS 5.0.
--
For information on using the Palm Developer Forums, or to unsubscribe, please see
http://www.palmos.com/dev/support/forums/