Props disappearing and multiple clients crashing.

Hey guys, so I’m having this problem where every few minutes to an hour all my props and entities disappear (trees, cars, doors, bushes, etc.) and shortly after sometimes up to 30 min later, my client crashes along with others crashing too. Garry’s mod made a dump file each time, so I uploaded it to a dump reading site and got all this foreign crap that I don’t know what it means. Could someone please help me find the problem with people crashing?
Thanks!

Linky: http://dumps.metastruct.uk.to/dumper.py?dump=hl2_153_crash_2013_1_21T4_15_22C0.mdmp

By the way: We added JetBoom’s particle spawner fix, but it didn’t work. People are still crashing periodically.