When using sysmouse, the delta components require signed char arithmentic on powerpc. The comment for the code block just below implies this, but it's needed in the main case as well. As an aside, NetBSD/PPC and Linux/PPC compile the entire server with -fsigned-chars. So far I haven't seen that this is necessary. How-To-Repeat: Watch the pointer move to the top right corner of the screen and stay there without this patch.
Responsible Changed From-To: freebsd-ports-bugs->freebsd-x11 Over to X11 gang
State Changed From-To: open->closed Committed upstream and in our ports. Will also be brought in with the XFree86 4.5 update.