GMOD 10 Hangs at "Loading resources"

Ive encountered a serious issue with gmod where some of the built in props and constraints screw my game save aka stop loading my map and I ahve to roll back to a previous working save. SO I found 2 items that cause garrys mod to lock up your loadings. The palm tree model from dust. ONce this is spawned on your map your map will no longer load the next time you try loading. The hoverball is a constraint that if you use it on a prop it will do the same symptom. Now I have a third and unknown problem that is hanging my map loading. I cant go anyfurther into my project untill the gmod bug is fixed. No add ons are in my gmod folder. Look into this please. thanks