The compilation issues with libCollada, which i got past after making some minor fixes. Also, the terrain in OpenGL seems very unstable. The character falls from it in certain areas (can't give more information right now, i'm trying to find a pattern in order to report this) and there are seams in the textures whenever you use normal or parallax mapping.
There are also random crashes with large terrains, but i also wasn't able to find a pattern yet. Are there any other Linux users out there? Maybe we can help by debugging together and sharing reports
Some of those aren't really OpenGL, persay, but yeah, definitely need to be addressed.
If you and anyone else running Linux have more details, like logs, or video/screenshots of stuff happening, then we can get all over that. It's hard to debug stuff we can't reproduce, after all