Asus A8N sli nforce4 AMD 64 3500+ (2.21mhz) 1gb ram Asus A8N sli nforce4 AMD 64 3500+ (2.21mhz) 1gb ram Gfx card: NVIDIA GeForce 6600 GT 128mb 160gb Sata HD. WinXP SP2 FS9 - fs91update FSNav 4.7 problem, When I run FSNavigator a split screen occurs in the top halve of the screen, same hight or debth as fsNav window when set to top RH corner, FS9 flies in the top part of screen, whilst the bottom halve and instrument panel freezes. fsNav carries on flying. It is a random occurence, and difficult to determine what causes it. Only happens with fsNav displayed and not with any other extra window diaplayed, ie. GPS, ATC etc. Note in foto aft straith & level, with horizon still showing previous bank, at moment of split. nick