Oil Imperium - cannot control pipeline building minigame with mouse

[Quark999]

This is an issue with the game Oil Imperium (sometimes known as "Black Gold") - when selling oil, sometimes the pipeline minigame pops up, where the player has to select certain pipeline pieces with their mouse by clicking on some icons. Unfortunately, on Minimig the vertical movements are next to impossible. According to the thread here http://eab.abime.net/showthread.php?t=41089 Oil Imperium uses a very strange way of polling for mouse input, and does so every line (!). WinUAE wasn't polling often enough and has since been changed to do so, and the latest version works fine with that minigame.
Unfortunately, the same cannot be said for Minimig - on Mister, even with 1000 Hz USB polling, the mouse cannot be controlled properly. There have been some changes to the WHDLoad image, but even on version 1.6 the problem persists on Minimig.