Issue with full screen and mouse cursor problem.
Found link: https://bbs.archlinux.org/viewtopic.php?id=122425

Confirm that starting FDRPG w/
"SDL_MOUSE_RELATIVE=0 freedroidRPG -f -rX" (where x is 1 of available resolutions)
The cursor responds normally in full screen mode (acts the same as window mode).

Now to dig into the bug...