Index: dirsvc.c
===================================================================
--- dirsvc.c	(revision 6965)
+++ dirsvc.c	(working copy)
@@ -91,7 +91,7 @@
 				    ipp_pstate_t state, const char *location,
 				    const char *info, const char *make_model,
 				    int num_attrs, cups_option_t *attrs);
-static void	process_implicit_classes(void);
+static void	process_implicit_classes(int *write_printcap);
 static void	send_cups_browse(cupsd_printer_t *p);
 #ifdef HAVE_LDAP
 static void	send_ldap_browse(cupsd_printer_t *p);
@@ -609,7 +609,7 @@
   * Do auto-classing if needed...
   */
 
-  process_implicit_classes();
+  process_implicit_classes(NULL);
 }
 
 
@@ -1685,7 +1685,8 @@
     cups_option_t *attrs)		/* I - Attributes */
 {
   int		i;			/* Looping var */
-  int		update;			/* Update printer attributes? */
+  int		update,			/* Update printer attributes? */
+		write_printcap;		/* Write the printcap file? */
   char		finaluri[HTTP_MAX_URI],	/* Final URI for printer */
 		name[IPP_MAX_NAME],	/* Name of printer */
 		newname[IPP_MAX_NAME],	/* New name of printer */
@@ -1772,11 +1773,12 @@
   * See if we already have it listed in the Printers list, and add it if not...
   */
 
-  type   |= CUPS_PRINTER_REMOTE | CUPS_PRINTER_DISCOVERED;
-  type   &= ~CUPS_PRINTER_IMPLICIT;
-  update = 0;
-  hptr   = strchr(host, '.');
-  sptr   = strchr(ServerName, '.');
+  type           |= CUPS_PRINTER_REMOTE | CUPS_PRINTER_DISCOVERED;
+  type           &= ~CUPS_PRINTER_IMPLICIT;
+  update         = 0;
+  write_printcap = 0;
+  hptr           = strchr(host, '.');
+  sptr           = strchr(ServerName, '.');
 
   if (!ServerNameIsIP && sptr != NULL && hptr != NULL)
   {
@@ -1899,7 +1901,8 @@
       cupsdSetString(&p->device_uri, uri);
       cupsdSetString(&p->hostname, host);
 
-      update = 1;
+      update         = 1;
+      write_printcap = 1;
     }
   }
   else
@@ -2005,7 +2008,8 @@
       cupsdSetString(&p->uri, uri);
       cupsdSetString(&p->device_uri, uri);
 
-      update = 1;
+      write_printcap = 1;
+      update         = 1;
     }
   }
 
@@ -2064,7 +2068,8 @@
   if (info && (!p->info || strcmp(p->info, info)))
   {
     cupsdSetString(&p->info, info);
-    update = 1;
+    update         = 1;
+    write_printcap = 1;
   }
 
   if (!make_model || !make_model[0])
@@ -2153,6 +2158,7 @@
       if (p->type & CUPS_PRINTER_DEFAULT)
       {
         DefaultPrinter = p;
+	write_printcap = 1;
 	break;
       }
   }
@@ -2161,13 +2167,14 @@
   * Do auto-classing if needed...
   */
 
-  process_implicit_classes();
+  process_implicit_classes(&write_printcap);
 
  /*
   * Update the printcap file...
   */
 
-  cupsdWritePrintcap();
+  if (write_printcap)
+    cupsdWritePrintcap();
 }
 
 
@@ -2657,7 +2664,8 @@
  */
 
 static void
-process_implicit_classes(void)
+process_implicit_classes(
+    int *write_printcap)		/* O - Write printcap file? */
 {
   int		i;			/* Looping var */
   int		update;			/* Update printer attributes? */
@@ -2738,6 +2746,9 @@
 
         update = 1;
 
+	if (write_printcap)
+	  *write_printcap = 1;
+
         cupsdLogMessage(CUPSD_LOG_DEBUG, "Added implicit class \"%s\"...",
 	                name);
 	cupsdAddEvent(CUPSD_EVENT_PRINTER_ADDED, p, NULL,
Index: printers.c
===================================================================
--- printers.c	(revision 6965)
+++ printers.c	(working copy)
@@ -2984,7 +2984,8 @@
   * data has come from...
   */
 
-  cupsFilePuts(fp, "# This file was automatically generated by cupsd(8) from the\n");
+  cupsFilePuts(fp,
+               "# This file was automatically generated by cupsd(8) from the\n");
   cupsFilePrintf(fp, "# %s/printers.conf file.  All changes to this file\n",
                  ServerRoot);
   cupsFilePuts(fp, "# will be lost.\n");
@@ -3010,14 +3011,15 @@
 
           if (DefaultPrinter)
 	    cupsFilePrintf(fp, "%s|%s:rm=%s:rp=%s:\n", DefaultPrinter->name,
-	            DefaultPrinter->info, ServerName, DefaultPrinter->name);
+	                   DefaultPrinter->info, ServerName,
+			   DefaultPrinter->name);
 
 	  for (p = (cupsd_printer_t *)cupsArrayFirst(Printers);
 	       p;
 	       p = (cupsd_printer_t *)cupsArrayNext(Printers))
 	    if (p != DefaultPrinter)
 	      cupsFilePrintf(fp, "%s|%s:rm=%s:rp=%s:\n", p->name, p->info,
-	              ServerName, p->name);
+	                     ServerName, p->name);
           break;
 
       case PRINTCAP_SOLARIS:
@@ -3055,9 +3057,10 @@
 	       p;
 	       p = (cupsd_printer_t *)cupsArrayNext(Printers))
 	    cupsFilePrintf(fp, "%s:\\\n"
-	        	"\t:bsdaddr=%s,%s:\\\n"
-			"\t:description=%s:\n",
-		    p->name, ServerName, p->name, p->info ? p->info : "");
+	        	       "\t:bsdaddr=%s,%s:\\\n"
+			       "\t:description=%s:\n",
+		           p->name, ServerName, p->name,
+			   p->info ? p->info : "");
           break;
     }
   }