Using 1.3.0 on fc11-ppc
Using default keymapping
Using doom1 shareware iwad
press and hold right arrow
press and hold down arrow
press and hold left arrow
release right arrow
release down arrow
release left arrow
Result: You are stuck turning to the right even though the right arrow is not pressed.
Notes:
When the down arrow is not part of the process, this behaves correctly.
When just left and right are pressed, the turns cancel eachother out. When right, down, left are pressed and held in that order, the left does not cancel the right, and releasing the right does not change the movement state. Thus I think the problem originates from when left is pressed.