We had a weird thing happen in vendor pricing.  Purchasing set up pricing for a particular part with only one vendor and put 1 in the quantity field and the current price.  She just received a shipment of 1000.  When she looked at the vendor pricing in PO-H, the vendor code was gone for the item and the expiration date had changed from 1/31/05 to 1/01/2015! And the quanity 1 was changed from 1 to 99999999.99 !!  The only thing that was the same was the part number and the price.  What is changing the information in vendor pricing? ???