diff -up gnome-system-monitor-3.1.1/src/load-graph.cpp.format gnome-system-monitor-3.1.1/src/load-graph.cpp
--- gnome-system-monitor-3.1.1/src/load-graph.cpp.format	2011-05-12 16:55:55.816792353 -0400
+++ gnome-system-monitor-3.1.1/src/load-graph.cpp	2011-05-12 16:59:03.419446997 -0400
@@ -433,11 +433,11 @@ net_scale (LoadGraph *g, guint64 din, gu
 	  g_assert(coef10 % g->num_bars() == 0);
 
 	  new_max = coef10 * (1UL << guint64(base10 * 10));
-	  procman_debug("bak %lu new_max %lu pow2 %lu coef10 %lu", bak_max, new_max, pow2, coef10);
+	  procman_debug("bak %" G_GUINT64_FORMAT " new_max %" G_GUINT64_FORMAT " pow2 %" G_GUINT64_FORMAT " coef10 %" G_GUINT64_FORMAT, bak_max, new_max, pow2, coef10);
 	}
 
 	if (bak_max > new_max) {
-	  procman_debug("overflow detected: bak=%lu new=%lu", bak_max, new_max);
+	  procman_debug("overflow detected: bak=%" G_GUINT64_FORMAT " new=%" G_GUINT64_FORMAT, bak_max, new_max);
 	  new_max = bak_max;
 	}
 
@@ -455,7 +455,7 @@ net_scale (LoadGraph *g, guint64 din, gu
 		}
 	}
 
-	procman_debug("rescale dmax = %lu max = %lu new_max = %lu", dmax, g->net.max, new_max);
+	procman_debug("rescale dmax = %" G_GUINT64_FORMAT " max = %" G_GUINT64_FORMAT " new_max = %" G_GUINT64_FORMAT, dmax, g->net.max, new_max);
 
 	g->net.max = new_max;