Key events work fine for KEY_SYSRQ (code 183), but isKeyDown(KEY_SYSRQ) always returns false.
Only tested on Windows with a UK layout.
This is the standard behavior on Windows. SYSRQ only generates KEYUP events, so there's no way for isKeyDown to ever return true. LWJGL events work as expected because a dummy KEYDOWN event is generated when LWJGL receives a KEYUP for SYSRQ.