You know when you're chaning heading for example, and holding down the mouse button initially increases the value in single units, and then it increases more rapidly as FS9 recognises that you're trying to make the selection more quickly? While this was initially a good M$ idea, more complex panels and gauges can unfortunately be written in such a way that they are constantly making calls on FS9 in the same way without your input. This results in the program being overloaded with gauge commands, resulting in the effect you describe.
There is a simple way of fixing it - but it'll cost you. The payware version of FSUIPC has a checkbox for 'fix control acceleration', which is what it calls this effect. Rob Barendregt has written a gauge that assists with the problem of E+1, 2, 3, 4 engine start, or multiple exit openings not working (which is also a knock-on from this effect) but I don't think it fixes control acceleration, and I don't know of another gauge that will fix the problem - does anyone else?
Another way of addressing it might be to change the panel you're using?
