			KNOWN BUGS AND WORKAROUNDS

Silicon Graphics:

	The network lock manager seems to be broken on release 5.1.1.1
	of IRIX, and therefore rpict, rtrace and rview will not be able
	to share ambient files while running simultaneously.  Also,
	rpiece will not work.

System V derivative UNIX's:

	The network lock manager in general seems to be unreliable on
	most SGI's, so rpiece may abort with strange results.  I haven't
	a clue how to fix this, as it appears to be an operating system
	defect.  Please take the time to complain to your vendor if you
	run into this problem.  It's going to take a lot of people
	coming to them before they're likely to do anything about it.

	If the renderers give you some message about not being able
	to lock or unlock a file, you can add the following line
	to the end of src/common/standard.h as a last resort:

	#undef F_SETLKW

	This should remove all the dependent code, killing
	rpiece in the process.


DEC Alpha Workstations

	The global ucode optimizer doesn't seem to like the use of global
	variables in ray/src/rt/noise3.c, so it is necessary to compile
	this module separately with -O1.  I wish there were some automatic
	way to do this, but I can't think of one.  Until they fix this
	compiler bug, it is necessary to manually go into the src/rt
	directory and execute the following (after running makeall install):

	% rm noise3.o
	% rmake -n noise3.o
	% # copy above line, but change -O to -O1
	% rmake install

