Hmm..."Off in space"...
I've had THAT pain in the arse before...
I see you've solved your problem, but this is one little tip on the fight against objects Off in space.
When you're copying or moving something, do it right! I mean, select your objects, but if you want to cancel the command, DON'T do it by hitting Enter again! It fires those objects Off Into Outer Space!!! I don't know how to stop it from doing that, but one of the guys here does that constantly, so when you do a Zoom Extents, sometimes, the drawing is nothing but a wee spec in the corner and you'll see a line or whatever off in the other corner, etc...
Glad you got it fixed though, Dan.