diff --git a/memcheck/mac_leakcheck.c b/memcheck/mac_leakcheck.c
index d51d54541..745a7d76e 100644
--- a/memcheck/mac_leakcheck.c
+++ b/memcheck/mac_leakcheck.c
@@ -660,7 +660,7 @@ void MAC_(do_detect_memory_leaks) (
                                MAC_(bytes_reachable), blocks_reachable );
       VG_(message)(Vg_UserMsg, "        suppressed: %d bytes in %d blocks.", 
                                MAC_(bytes_suppressed), blocks_suppressed );
-      if (mode == LC_Summary)
+      if (mode == LC_Summary && blocks_leaked > 0)
 	 VG_(message)(Vg_UserMsg,
 		      "Use --leak-check=full to see details of leaked memory.");
       else if (!MAC_(clo_show_reachable)) {
diff --git a/memcheck/mac_needs.c b/memcheck/mac_needs.c
index 7342460c7..28a828e65 100644
--- a/memcheck/mac_needs.c
+++ b/memcheck/mac_needs.c
@@ -49,7 +49,7 @@
 
 Bool          MAC_(clo_partial_loads_ok)       = True;
 Int           MAC_(clo_freelist_vol)           = 1000000;
-LeakCheckMode MAC_(clo_leak_check)             = LC_Off;
+LeakCheckMode MAC_(clo_leak_check)             = LC_Summary;
 VgRes         MAC_(clo_leak_resolution)        = Vg_LowRes;
 Bool          MAC_(clo_show_reachable)         = False;
 Bool          MAC_(clo_workaround_gcc296_bugs) = False;
@@ -88,7 +88,7 @@ void MAC_(print_common_usage)(void)
    VG_(printf)(
 "    --partial-loads-ok=no|yes        too hard to explain here; see manual [yes]\n"
 "    --freelist-vol=<number>          volume of freed blocks queue [1000000]\n"
-"    --leak-check=no|summary|full     search for memory leaks at exit? [no]\n"
+"    --leak-check=no|summary|full     search for memory leaks at exit?  [summary]\n"
 "    --leak-resolution=low|med|high   how much bt merging in leak check [low]\n"
 "    --show-reachable=no|yes          show reachable blocks in leak check? [no]\n"
 "    --workaround-gcc296-bugs=no|yes  self explanatory [no]\n"
diff --git a/tests/vg_regtest.in b/tests/vg_regtest.in
index 7433b7e80..dfe87f9d0 100755
--- a/tests/vg_regtest.in
+++ b/tests/vg_regtest.in
@@ -280,7 +280,7 @@ sub do_one_test($$)
     # Pass the appropriate --tool option for the directory (can be overridden
     # by an "args:" line, though).  
     my $tool=determine_tool();
-    mysystem("VALGRINDLIB=$tests_dir/.in_place $valgrind --command-line-only=yes --tool=$tool $vgopts $prog $args > $name.stdout.out 2> $name.stderr.out");
+    mysystem("VALGRINDLIB=$tests_dir/.in_place $valgrind --command-line-only=yes --memcheck:leak-check=no --addrcheck:leak-check=no --tool=$tool $vgopts $prog $args > $name.stdout.out 2> $name.stderr.out");
 
     if (defined $stdout_filter) {
         mysystem("$stdout_filter < $name.stdout.out > $tmp");