diff -dur povray-3.50c.orig/acinclude.m4 povray-3.50c/acinclude.m4
--- povray-3.50c.orig/acinclude.m4	2002-12-30 20:33:38.000000000 +0100
+++ povray-3.50c/acinclude.m4	2004-01-07 14:21:23.602520944 +0100
@@ -38,11 +38,11 @@
                      /usr/gnu           \
                      /opt/gnu           \
                      /opt/local/pvm3    \
-                     /usr/lib/pvm3      \
-                     /usr/local/lib/pvm3\
+                     /usr/lib64/pvm3      \
+                     /usr/local/lib64/pvm3\
                      /opt/local/pvm     \
-                     /usr/lib/pvm       \
-                     /usr/local/lib/pvm \
+                     /usr/lib64/pvm       \
+                     /usr/local/lib64/pvm \
                      $prefix            \
                     "
   dnl ******************************************
Only in povray-3.50c: acinclude.m4~