I posted awhile back about a problem I had (still have) in PO with the History purge, specifically Receipts. It may or may not be relevant; it revolves around the distinction between 'Primary' Vendor and 'All' Vendor. I was advised these are located in different files, Primary in Header file and All in Total file. One purged successfully (Receipts Primary Vendors) and one did not (Receipts All Vendor) Also, now, when I copy my data files to removable media, I get a question every time about the file IRTOTL'R.xxx that has extra information attached that might be lost in the copy. The extra info is identified as Document Summary Information.
DIC and rebuild do not fix this even after latest SP. Since it seems like it could be related to the Vendor Total problems, thought I would mention it again in case it might reveal something useful.
Jody