[AccessD] Drag and Drop

Has anyone had problems with Access using the drag and drop options?

This is not actual application work per say but copying components from one
database to another.

Scenario is as such: Two different copies of MS Access 2003 open on one
computer, each with different databases open. New forms are being dragged
and dropped (copied) from one database to the other. The system stops....
pause... The contents of the source forms are gone... There are a few
warnings like: Form XXXX no available but nothing else. 

I am allowed to exit but with similar error messages and when returning the
form components are still gone. Database Compact and Repair recovers nothing
and the MDB is left empty of forms...

I did have a backup earlier in the day so the problem is not too serious but
what would stop this from not happening again and most importantly why did
this happen in the first place?

Any similar experiences?

Jim