X-Plane 8.50 will introduce a new version of the apt.dat file, but it is also designed to support old apt.dat files without any changes. So if you download the 850 beta (not out yet, but soon!) and an apt.dat file that used to work stops working, that’s a bug!
If you hit this case, please do not change your apt.dat file to work around the problem – instead please file a bug. A link to our bug reporter can be found on the bottom of this page.
Also OS X 10.4.7 is out and we’ve received some reports of crashes. So far these appear to be related to custom scenery packages using ENV. If you remove custom scenery and the crash goes away, then please try to identify which scenery package in particular crashes (ideally which ENV file), and then file a bug with that specific package. If we can get a specific package that causes the problem, we’ll be able to fix this a lot quicker.
