Hello, I'm experiencing the same problem too.
I'm using ArcMap 10.0 SP2 and ArcPad 10 is installed on my computer.
The first time I used it the Data Manager succeeded in exporting one layer, and then crashed ArcMap, like a few of you.
Now, anytime I'm trying to export again, I don't even reach the pop asking which layers I'd like to export and where. So I can't even choose a local destination to export to...
Any idea?
EDIT: After trying to figure it out, I want to export a point layer that is in a .gdb on our Direction servern and which is in projection A, and a background layer that is in a ArcSDE geodatabase on the Government geographic server. The background layer's projection is different than my point layer's.
So all of a sudden, many causes for my problem, and not that many that I can influence or change to resolve it when I read the solutions given above...
It used to work on the previous versions I had installed on this same computer: ArcMap 9.3 and ArcPad 7.1. Please make it happen 😉