Hello, I am deeply sorry that you had to wait so long for a possible sollution.
Well, I came across this forum looking for a sollution myself! I can say that i found one.
When selecting an object and you accidently press spacebar, it goes into ''object lock
This makes it impossible for you to select other objects. This is quite a helpfull option, if you have to edit an object.
You can also disable or enable this tool, with a lock icon at the bottom of the screen, right under screen 4.http://s7.postimage.org/wfxlmdr57/Help.jpg
I hope this helped.