The vers.req file is used to retrieve firmware information from the camera. After holding down FUNCSET then press DOWN: Canon PowerShot SD970 IS P-ID:31C1 NT D Firmware Ver GM1.00A NoError Jan 29 2009 13:03:40 Another unit indicated a firmware version of GM1.00B and a timestamp of May 13, 2009, 12:51:14. An european version shows: Canon DIGITAL IXUS 990 IS P-ID:31C1 PAL D Firmware Ver GM1.00A Subsequent press of DOWN (while still holding FUNCSET) reveals: Canon PowerShot SD970 IS P-ID:31C1 NT D Adj Ver.007.005 and another press of DOWN (while still holding FUNCSET) brings up this: