So with the latest 1.5.7, all terrain mods will fail the Integrity Check on MP servers. Result? You can't play with your favourite terrain mod and have to revert back to the #%&*$# default textures.
I think ED should run Integrity Check on their own brains before releasing any "updates"...
P.S. At least the Chinese flight manual of the Su-25t has been updated, that was totally worth it.