In the "Insert" command dialog box, the drop down list in the "Name" field contains some oddly named items that have no preview. The drawing was previously the property of someone who was very fond of cut and paste between ACAD drawings (had no use for Design Center). I've heard (perhaps erroneously) that these "phantom blocks" are the result of such cut and paste operations.
How do I delete these items? Doing a "Purge" on the drawing doesn't touch them
The "phantom blocks" have weird names like "ABWD$DR3070HM" And "ABWD$DR3070HM$2370"
Using AutoCAD 2006 on Windows XP