diff -urNp perfctr-2.6.38.orig/etc/perfctr.rules perfctr-2.6.38/etc/perfctr.rules
--- perfctr-2.6.38.orig/etc/perfctr.rules	2007-04-09 14:50:36.000000000 +0200
+++ perfctr-2.6.38/etc/perfctr.rules	2009-02-17 19:44:05.524194241 +0100
@@ -1 +1 @@
-KERNEL=="perfctr",		MODE="0644"
+KERNEL=="perfctr",		MODE="0660", GROUP="perfctr"