Scroll wheel support

Dear developers, This may have been raised before, but I can't find anything about it. If a page in NetSurf has its own scroll bar, i.e. not a RISC OS scroll bar, then it won't react on the scroll wheel, at least not here. The funny thing is that if I control the same page in NetSurf from my Windows computer through VNC, then it does react on the scroll wheel of that computer. Now, what is that? 4té, RISC OS 5.29 NetSurf 3.11 (Dev CI #5318) Kind regards, Paul Sprangers