diff -ur metacity-2.4.0/src/screen.c metacity-2.4.0-new/src/screen.c
--- metacity-2.4.0/src/screen.c	Tue Aug  6 14:25:48 2002
+++ metacity-2.4.0-new/src/screen.c	Thu Aug 15 00:35:11 2002
@@ -1334,6 +1334,7 @@
     }
 }
 
+
 void
 meta_screen_calc_workspace_layout (MetaScreen *screen,
                                    int         num_workspaces,
@@ -1368,17 +1369,34 @@
   if (rows <= 0 && cols <= 0)
     cols = num_workspaces;
 
-  if (rows <= 0)
-    rows = num_workspaces / cols + ((num_workspaces % cols) > 0 ? 1 : 0);
-  if (cols <= 0)
-    cols = num_workspaces / rows + ((num_workspaces % rows) > 0 ? 1 : 0);
+  if (rows <= 0) {
+    /* fix PPC compile issue
+     * ICE occurs using embedded macro in calculation, split 
+     * into if statements 
+     */
+    if ((num_workspaces % cols) > 0) { 
+      rows = num_workspaces / cols + 1;
+    } else {
+      rows  = num_workspaces / cols;
+    }
+  }
+  if (cols <= 0) {
+    /* another fix for PPC compile issue */
+    if ((num_workspaces % rows) > 0) {
+      cols = num_workspaces / rows + 1;
+    } else {
+      cols = num_workspaces / rows;
+    }
+  }
 
   /* paranoia */
+
   if (rows < 1)
     rows = 1;
   if (cols < 1)
     cols = 1;
 
-  *r = rows;
-  *c = cols;
+  r[0] = rows;
+  c[0] = cols;
 }
+