Just a gentle reminder: please do not consider anything in a beta to be final!
By this I mean: there is a risk that file formats that are new to the current sim (860) could further change during the current (860) beta run.
So…if you are working on scenery that depends on new 860 features, please do not ship your final scenery until 860 is finished! This way you can be sure you’re compatible with the final formats.
If your scenery uses 850 features and 860 breaks them, please report a bug, as 860 should handle any legal scenery that 850 handles.
(This goes for plugin datarefs too!)