"3. DPI or Dots Per Inch
You may have seen all of the new mice being released with information given such “ultra high DPI”. Low profile mice may only use 200, 400 or at best 800DPI - if you have a low profile mouse, you may not need to take notice of the following section.
There is a major problem however, concerning the use of a high DPI setting in the Quake 3 engine. Join a server, and keep your crosshair focussed on the same point. Put an object next to the current placement of your mouse. Move your mouse swiftly to the other side of your mousepad or desk. Next, return it slowly to its previous position (next to the object). You will notice that your crosshair has not returned to the same point at which it started - even though it has moved back and forth exactly the same distance.
Whilst moving your mouse with a high DPI setting, it is more likely to lose data or mouse input. When you move the mouse back to its original position slowly, the engine is able to process all of the data. This results in different levels of data processed, and therefore, NEGATIVE ACCELERATION.
In an ideal situation, you want every movement of your mouse to be translated at exactly the same speed displayed on screen - no matter how fast or how slow you move it.
Do not fret… negative acceleration is not a flaw in your mouse, but simply a bug or glitch in the Quake 3 engine.
So, what should you do if you buy a new mouse? You could either set your DPI to 400, or you could change Operating System (OS) sensitivity via the control panel. The second or third notch should be fine.
Both of these ways will lower the DPI and no matter how fast you move your mouse, it will always move accurately."
http://www.crossfire.nu/?x=column&mode=item&id=92
i saw its an old article. but i’d like to know if this have some truth till now. or this bug has been fixed ?
thanks
