Whenever I'm playing KSP 0.90, the game seems to crash routinely about every 30-45 minutes, and whenever I look in the crash logs, it's always the same reason. Most, if not all such errors look something like this:

Unity Player [version: Unity 4.5.5f1_7684ad0c5a44]

mono.dll caused an Access Violation (0xc0000005)
  in module mono.dll at 0023:1011926a.

Error occurred at 2015-03-28_103124.
C:\Users\Ethan\Downloads\ksp-win-0-90-0\KSP_win\KSP.exe, run by Ethan.
40% memory in use.
0 MB physical memory [0 MB free].
0 MB paging file [0 MB free].
0 MB user address space [118 MB free].
Write to location 00200000 caused an access violation.

I am unable to provide the entire crash log due to it's size, but you can find it here. Also, here is the list of mods I have installed as well. None of them are outdated.

• BD Armory
• Tweakscale
• B9 Aerospace Pack.
• DarkMultiplayer
• PlanetFactory Revived
• Ferram Aerospace (FAR)

Is there a reason as to why this might be happening? Are there conflicting mods? Or is KSP just really buggy with this many mods installed?