I am not if I completely understand the purpose behind this. If so please educate me.

Once a file is attached it resides on the server, correct? Lets say a user wants to attach a document to an Item and then later wants to delete that attachment.  I thought that was what the 'delete' action within the Item Attachment grid did but I can see it only removes it from the item. This could be misleading and eventually leave a lot of clutter on the server. I also see the potential problem with users deleting item attachments they selected from the server and thus deleting the file entirely.

Dave