LWJGL 2.9.3 has just been released, with a few bug fixes that didn’t make it to LWJGL 2.9.2. Details here.
It includes an important fix for cursor movement behavior on Windows, when the mouse is grabbed. Whenever a keyboard key was held down (and repeat events fired), the cursor would stutter/drift horribly. This behavior was mostly noticeable with high repeat rates, with vsync enabled and/or with low frame rates. It also significantly affected Minecraft users (very noticeable in a 1st person view). With 2.9.3 cursor movement is now perfectly smooth.