We figured out that some missing ground textures were causing the frequent CTDs near the start of a campaign. As such, a patch (v3.0.003) has been put out that will fix these issues. Please refer to the Patches and Hotfixes post to download and install the patch. It is save-game compatible. There are some other minor things we want to fix, so another Patch (not save-game compatible) should be put out some time in the near future.
Also, if you haven't seen it yet, please enjoy this short promo video for v3.0 created by Fahnat.