Little issue with Properties Menu?
Opps... Thanks a lot. I feel like an idiot now. 
You just keep on trying till you run out of cake!?
One problem I've had is when creating a brush then tieing it to Func_Door, if I go and reselect it right away, Hammer freezes and crashes. Its to the point where if i make a Func-Door, I have to save right away just in case.
A little late, and I don't know if this is actually the problem, but: Look at the top right of your Hammer window. You can select things by Group, Object, or Solids. If you have Solid mode selected, checking properties will always result in the second of the two dialogs shown above, since you're now directly manipulating the solid that makes up the object, and not the object itself (which would have all the properties). This behavior seems pretty consistent, so I'm assuming that's what it is.