Mouse wheel doesn't work on secondary monitor

Hi,

The mouse wheel is not working in either the filter-editor or the main window if Filter Forge is placed on my secondary monitor. If I place the application so that it straddles both monitors, the mouse wheel only works when the mouse is over the part of it on the main monitor.

I've monitored the window-messages, and can confirm that the application is receiving WM_MOUSEWHEEL messages in both cases.

The problem is almost certainly that my secondary monitor is to the left of my primary monitor, which causes the mouse x-coordinates to be negative on that monitor. I suspect FF is (incorrectly) assuming the negative coordinates are invalid and ignoring the WM_MOUSEWHEEL message. This is further corroborated by the fact that if I (virtually) swap my primary and secondary monitors so that the secondary monitor uses positive x-coordinates, the mouse wheel works fine.

The problem affect both the current version of FF3, and the betas of FF4.

Thanks,