AutoCAD 2009 users, I strongly suggest you go and set the new system variable OPENPARTIAL to 0. Now.
Why? Because if it’s set to the default value of 1, purging can be harmful to your drawings. I’ll fill in the details in a future Bug Watch column, but for now I suggest you just go and fix up that variable. It’s stored in the Registry, so you should only need to do it once unless you use multiple profiles, in which case you should do it once per profile.