For some time our library has experienced problems with scanning library card barcodes into Koha for checkout or book barcodes for cataloging, and the system returns a patron (if library card) or item record (if book), different from that scanned in. The problem appears seemingly at random intervals and infrequently, but in time clusters. It happens at two different locations, on different computers at each location, and with those computers using different barcode readers. This suggests the problem is not related to the client workstations or barcode readers. I'm never close to the computers when this happens, so I can't determine if the barcode numbers are close (off by one digit or initial/terminal digit?), or if there is any other relationship. I suspect neither. I wonder if it may be something internal to Koha; I'm unsure what the time clustering (two days ago it happened approximately eight times) implies. We have also recently changed the system setting "CircAutocompl" to "don't try" for a non-related issue; we'll see if that makes a difference with the scanning. Views and comments welcome. -- Greg Lawson Network Administrator Rolling Hills Consolidated Library 1912 N. Belt Highway St. Joseph, MO 64506