The reason I wanted to update my BIOS was because I bought new RAM, Kingston DDR2 HyperX Blu 4GB (two 2 GB sticks), that is supposed to be compatible with M2N4-SLI mobo. When I tried installing the RAM I would get 1 long 2 short beeps. I even called Kingston and they verified it should work with that motherboard. When I told him the BIOS version I was using he said I should update the BIOS so the motherboard would recognize the brand new RAM.
I already looked in the ASUS M2N4-SLI motherboard specific forum and there's not much activity or information there. Other people have experienced the same issue using BIOS versions 1206 and 1205, but there has not been much feedback for those people either. I called ASUS support (and they don't seem to know too much) and it was suggested to re-flash the BIOS with 1206 and then call back. Does anyone know if the BIOS version 1206 USB mouse issue can be fixed?