We've made some changes in the way we handle packages order ingame. If you have created add-ons that modified the content.xml file, they may not produce the expected result anymore.
The content.xml file used to list all the scenery packages, and the game loaded them as they were sorted in the file.
Now the content.xml's structure is the following:
<Priorities> <Package name="package1" priority="2"/> <Package name="package2" priority="1"/> </Priorities>
By default, the order is the same as defined in the VFS, but in this .xml file you can use the priority system to define which package goes first. (priority 1 is loaded first, no matter what the package position is in the .xml.)
There is no need to edit the .xml file directly: a tool is available in the Experimental section of the menu.
Please note that this isn't available on Xbox at the moment.