Merge branch 'develop' of github.com:EllisLab/CodeIgniter into develop
diff --git a/application/config/user_agents.php b/application/config/user_agents.php
index 03cba9b..c3c7eae 100644
--- a/application/config/user_agents.php
+++ b/application/config/user_agents.php
@@ -174,6 +174,7 @@
 	'mobilexplorer'	=> "Mobile Explorer",
 	'operamini'		=> "Opera Mini",
 	'opera mini'	=> "Opera Mini",
+	'opera mobi'	=> "Opera Mini",
 
 	// Other
 	'digital paths'	=> "Digital Paths",
diff --git a/system/core/Common.php b/system/core/Common.php
index e43bb8d..b0921fe 100644
--- a/system/core/Common.php
+++ b/system/core/Common.php
@@ -419,6 +419,7 @@
 							415	=> 'Unsupported Media Type',
 							416	=> 'Requested Range Not Satisfiable',
 							417	=> 'Expectation Failed',
+							422	=> 'Unprocessable Entity',
 
 							500	=> 'Internal Server Error',
 							501	=> 'Not Implemented',
diff --git a/user_guide_src/source/libraries/image_lib.rst b/user_guide_src/source/libraries/image_lib.rst
index 300cbef..14bd128 100644
--- a/user_guide_src/source/libraries/image_lib.rst
+++ b/user_guide_src/source/libraries/image_lib.rst
@@ -360,7 +360,7 @@
                                                                     image headers.
 **quality**             90%                 1 - 100%                Sets the quality of the image. The higher the quality the larger the
                                                                     file size.
-**padding**             None                A number                The amount of padding, set in pixels, that will be applied to the
+**wm_padding**          None                A number                The amount of padding, set in pixels, that will be applied to the
                                                                     watermark to set it away from the edge of your images.
 **wm_vrt_alignment**    bottom              top, middle, bottom     Sets the vertical alignment for the watermark image.
 **wm_hor_alignment**    center              left, center, right     Sets the horizontal alignment for the watermark image.