See attached pics.
In screenshot #1 you can see the purplish colored 2D block below the brown 3D version of itself, with the red Datum block on it. That puplish block is inside an overall XREF'd dwg that is attached to the drawing I have open.
When I 'REFEDIT' that dwg to move the block or do whatever else I need to, the block is scaled 1/1000.
You can see where I've highlighted the location of the blocks (all blocks are scaled 1/1000 about their insertion point) and you can see how tiny they are -after- the REFEDIT is begun in the second screenshot.
My units in the container drawing are set to millimeters, my units in the XREF'd dwg are meters.
It's a real PITA and I'm wondering if there is something I'm doing wrong. I've never had this problem before, and I know I've had drawings with differing units before all XREF'd together and what not.