diff --git a/Main/GNUmakefile b/Main/GNUmakefile
index d8d1b3398..da53c5370 100644
--- a/Main/GNUmakefile
+++ b/Main/GNUmakefile
@@ -20,6 +20,7 @@ $(SOGOD)_OBJC_FILES += \
 	sogod.m			\
 	SOGo.m			\
 	SOGoProductLoader.m	\
+	SOGoStartupLogger.m	\
 	build.m
 
 -include GNUmakefile.preamble
diff --git a/Main/SOGo.m b/Main/SOGo.m
index d15342cec..99a62671e 100644
--- a/Main/SOGo.m
+++ b/Main/SOGo.m
@@ -59,12 +59,7 @@
 #import "NSException+Stacktrace.h"
 
 #import "SOGo.h"
-
-@interface SOGoStartupLogger : NSObject
-@end
-
-@implementation SOGoStartupLogger
-@end
+#import "SOGoStartupLogger.h"
 
 @implementation SOGo
 
@@ -88,7 +83,7 @@ static BOOL debugLeaks = NO;
   SOGoStartupLogger *logger;
   id tmp;
 
-  logger = [SOGoStartupLogger new];
+  logger = [SOGoStartupLogger sharedLogger];
   [logger logWithFormat: @"starting SOGo (build %@)", SOGoBuildDate];
   
   ud = [NSUserDefaults standardUserDefaults];
@@ -132,7 +127,6 @@ static BOOL debugLeaks = NO;
 
   trustProxyAuthentication = [ud boolForKey: @"SOGoTrustProxyAuthentication"];
   useRelativeURLs = [ud boolForKey: @"WOUseRelativeURLs"];
-  [logger release];
 }
 
 - (id) init
diff --git a/Main/SOGoStartupLogger.h b/Main/SOGoStartupLogger.h
new file mode 100644
index 000000000..2e6c0b368
--- /dev/null
+++ b/Main/SOGoStartupLogger.h
@@ -0,0 +1,34 @@
+/* SOGoStartupLogger.h - this file is part of SOGo
+ *
+ * Copyright (C) 2009 Inverse inc.
+ *
+ * Author: Wolfgang Sourdeau <wsourdeau@inverse.ca>
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef SOGOSTARTUPLOGGER_H
+#define SOGOSTARTUPLOGGER_H
+
+#import <NGExtensions/NSObject+Logs.h>
+
+@interface SOGoStartupLogger : NSObject
+
++ (id) sharedLogger;
+
+@end
+
+#endif /* SOGOSTARTUPLOGGER_H */
diff --git a/Main/SOGoStartupLogger.m b/Main/SOGoStartupLogger.m
new file mode 100644
index 000000000..747986ccb
--- /dev/null
+++ b/Main/SOGoStartupLogger.m
@@ -0,0 +1,37 @@
+/* SOGoStartupLogger.m - this file is part of $PROJECT_NAME_HERE$
+ *
+ * Copyright (C) 2009 Inverse inc.
+ *
+ * Author: Wolfgang Sourdeau <wsourdeau@inverse.ca>
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#import "SOGoStartupLogger.h"
+
+@implementation SOGoStartupLogger
+
++ (id) sharedLogger
+{
+  static id logger = nil;
+
+  if (!logger)
+    logger = [self new];
+
+  return logger;
+}
+
+@end
diff --git a/Main/sogod.m b/Main/sogod.m
index 167fca2a8..6b02d95ff 100644
--- a/Main/sogod.m
+++ b/Main/sogod.m
@@ -32,6 +32,7 @@
 #if defined(LDAP_CONFIG)
 #import <SOGo/SOGoLDAPUserDefaults.h>
 #endif
+#import "SOGoStartupLogger.h"
 
 typedef void (*NSUserDefaultsInitFunction) ();
 
@@ -60,6 +61,9 @@ prepareUserDefaults (NSUserDefaults *ud)
 {
   NSString *redirectURL;
   NSDictionary *domain;
+  SOGoStartupLogger *logger;
+
+  logger = [SOGoStartupLogger sharedLogger];
 
   domain = [ud persistentDomainForName: @"sogod"];
   if (![domain count])
@@ -67,7 +71,7 @@ prepareUserDefaults (NSUserDefaults *ud)
       domain = [ud persistentDomainForName: @"sogod-0.9"];
       if ([domain count])
 	{
-	  NSLog (@"migrating user defaults from sogod-0.9");
+	  [logger logWithFormat: @"migrating user defaults from sogod-0.9"];
 	  [ud setPersistentDomain: domain forName: @"sogod"];
 	  [ud removePersistentDomainForName: @"sogod-0.9"];
 	  [ud synchronize];
@@ -75,9 +79,17 @@ prepareUserDefaults (NSUserDefaults *ud)
     }
 
   redirectURL = [ud stringForKey: @"WOApplicationRedirectURL"];
-  if ([redirectURL hasSuffix: @"/"])
-    [ud setObject: [redirectURL substringToIndex: [redirectURL length] - 1]
-           forKey: @"WOApplicationRedirectURL"];
+  if (redirectURL)
+    {
+      [logger warnWithFormat:
+                @"Using obsolete 'WOApplicationRedirectURL' user default."];
+      [logger warnWithFormat:
+                @"  Please configure the use of the x-webobjects-XXX headers"
+              @" with your webserver (see sample files)."];
+      if ([redirectURL hasSuffix: @"/"])
+        [ud setObject: [redirectURL substringToIndex: [redirectURL length] - 1]
+               forKey: @"WOApplicationRedirectURL"];
+    }
   [ud setBool: YES forKey: @"WOMessageUseUTF8"];
   [ud setBool: YES forKey: @"WOParsersUseUTF8"];
   [ud setBool: YES forKey: @"NGUseUTF8AsURLEncoding"];