select mesh>cleanup cleanup matching poygons radio button in the remove geometry section check all four boxes - lamina faces, nonmanifold geo, edges with zero length, faces with zero area.
The last option is for uv's so don't worry about it.
When you press cleanup all the doubled verts should be cleaned up.
As yet another option you could select all the verts and then do edit mesh>merge verts and all the doubled verts should merge and that will also fix the problem/ make sure you have a very low threshold so you do not collapse needed edges
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
Last edited by ctbram; 01-12-2011 at 05:34 PM.