I'm using 2008 LT and have also come across this issue. I have had a 'bolt on' (slingshot) added to my LT to bring it up to somewhere near full version although it can leave a lot to be desired. However, this bolt on does allow images to be detached in the same fashion as 2008 full. If you are still having problems I suggest you do a search for this software. If anyone has found another way of detaching images from AutoCAD LT I would love to know as other users in my office have the same issue and don't have the software.

If you click on "unload", it will just remove the image on the dwg BUT it will leave the image frame and the reference.  So I erase the actual image in the dwg file.  Then it says Unreferenced.  I can't purge it anymore than it already is.  Here is a screenshot of that.

nmilsaps wrote: Tried that already also, the image block is on the xref dwg, the xref_arch dwg, and the main dwg.  Probably because they were made from the same dwg file that originally had the image block secretly attached.  Is my only option to set up a new dwg and copy/paste the xref into it?

First find which xref the image was originally in. Detach it from that xref, purge, save and reload and it should be gone.

I find that often drawings from consultants or title blocks have logos or other images attached, but not found.

unload it from the xref, not the dwg it references, that should take it out

Im trying to recreate your problem.  Use detach rather than unload.  Also delete any references in block editor if any remain.

I hope this helps, im out of ideas