diff -up gimp-2.8.6/etc/gimprc.external-help-browser gimp-2.8.6/etc/gimprc
--- gimp-2.8.6/etc/gimprc.external-help-browser	2013-07-02 12:04:11.011774506 +0200
+++ gimp-2.8.6/etc/gimprc	2013-07-02 12:04:25.408824028 +0200
@@ -671,7 +671,7 @@
 # Sets the browser used by the help system.  Possible values are gimp and
 # web-browser.
 # 
-# (help-browser gimp)
+(help-browser web-browser)
 
 # When enabled, the online user manual will be used by the help system.
 # Otherwise the locally installed copy is used.  Possible values are yes and