Slow screen update when in fullscreen

[_Steve_]

I have noticed recently that when my WinUAE is set to fullscreen, it refreshes the display much slower than it should be, to the point when scrolling a directory in DOpus for example, you can physically watch it redrawing the text from top to bottom.

At first I thought my problem lay with something on the Amiga side, but when I copied over my Workbench folder from another machine that is working fine, it was still rally sluggish with the refreshes.

In playing with WinUAE today, I accidentally pressed Ctrl-F12 instead of (Ctrl-F11 to kill the program) which changed it to windowed mode, and surprisingly all refreshes were back full speed.

I have the same problem now with my older UAE exes (I have tried 0.9.91, 1.4.3.0 and the recent 1.4.6 betas), so I suspect it may be a driver issue rather than something inherent in the new builds. The only thing I have done recently is update my graphics card driver to the latest ForceWare 169.21 for WinXP Pro (32-bit) with an NVidia 8800GTX installed.

I have attached both the bootlog and runtime logs incase they show anything innocuous.