diff -Nuar cups-1.3.8.orig/scheduler/auth.c cups-1.3.8/scheduler/auth.c
--- cups-1.3.8.orig/scheduler/auth.c	2008-04-21 18:13:22.000000000 -0500
+++ cups-1.3.8/scheduler/auth.c	2008-10-08 16:23:32.000000000 -0500
@@ -1281,6 +1281,7 @@
     const char    *groupname)		/* I - Group name */
 {
   int			i;		/* Looping var */
+  int			foundit;	/* Whether or not the search returned a positive result. */
   struct group		*group;		/* System group info */
   char			junk[33];	/* MD5 password (not used) */
 #ifdef HAVE_MBR_UID_TO_UUID
@@ -1302,29 +1303,43 @@
     return (0);
 
  /*
-  * Check to see if the user is a member of the named group...
+  * Iterate through all group entries until a match is found.
   */
-
-  group = getgrnam(groupname);
-  endgrent();
-
-  if (group != NULL)
+  setgrent();
+  foundit=0;
+  while(!foundit && (group=getgrent())!=NULL)
   {
    /*
-    * Group exists, check it...
+    * If the group name doesn't match, move on...
     */
+    if(strcasecmp(groupname, group->gr_name))
+      continue;
 
+   /*
+    * First, check to see if group ID matches the user's group ID.
+    */
+    if(user && group->gr_gid == user->pw_gid)
+    {
+      foundit=1;
+      break;
+    }
+    
+   /*
+    * Check to see if the user is listed as a member of the group...
+    */
     for (i = 0; group->gr_mem[i]; i ++)
       if (!strcasecmp(username, group->gr_mem[i]))
-	return (1);
+      {
+	foundit=1;
+	break;
+      }
   }
+  endgrent();
 
  /*
-  * Group doesn't exist or user not in group list, check the group ID
-  * against the user's group ID...
+  * If the group membership was confirmed, return.
   */
-
-  if (user && group && group->gr_gid == user->pw_gid)
+  if(foundit)
     return (1);
 
 #ifdef HAVE_MBR_UID_TO_UUID