Do you have a link.
http://www.sec.gov/Archives/edgar/data/313838/000114554908001104/k01608e20vf.htm
"* For the fiscal year ended March 31, 2008, the method of reporting hardware and software unit sales has been changed from production shipments to recorded sales. In accordance with this change, the numbers for the fiscal years ended March 31, 2006 and 2007 have been restated."
My own company states sales in the same way and we often, at the end of a particularly important quarter or the financial year, are pushed to get recorded sales on the books and then ship (and invoice) some time later. It tends to be only weeks and not months though, as the auditors would find foul.