Did the hyper-jump from 1.6 to 1.9.1.
First duplicated all files to another host and ran the upgrade script to get to 1.9.1. I could check the old host running 1.6 against the new host running 1.9.. Much to my surprise there were no surprises. Amazing.
On the new host running 1.9.1 there's one oddity. All my old tickets exist but there are no more links to any attachments. I can see the files in the attachment directory so I know they exist.
I sense there's an attachment pathing difference somewhere in the 1.9.1 world vs. the old 1.6. Any idea where one might look for this?.