diff --git a/system/helpers/captcha_helper.php b/system/helpers/captcha_helper.php
index 2d2ae77..29911dc 100644
--- a/system/helpers/captcha_helper.php
+++ b/system/helpers/captcha_helper.php
@@ -142,7 +142,7 @@
 
 		is_array($colors) OR $colors = $defaults['colors'];
 
-		foreach (array_keys($default['colors']) as $key)
+		foreach (array_keys($defaults['colors']) as $key)
 		{
 			// Check for a possible missing value
 			is_array($colors[$key]) OR $colors[$key] = $defaults['colors'][$key];
diff --git a/system/helpers/form_helper.php b/system/helpers/form_helper.php
index bc14df2..6fca73f 100644
--- a/system/helpers/form_helper.php
+++ b/system/helpers/form_helper.php
@@ -50,15 +50,10 @@
 	 * @param	array	a key/value pair hidden data
 	 * @return	string
 	 */
-	function form_open($action = '', $attributes = '', $hidden = array())
+	function form_open($action = '', $attributes = array(), $hidden = array())
 	{
 		$CI =& get_instance();
 
-		if ($attributes === '')
-		{
-			$attributes = 'method="post"';
-		}
-
 		// If an action is not a full URL then turn it into one
 		if ($action && strpos($action, '://') === FALSE)
 		{
@@ -70,10 +65,22 @@
 			$action = $CI->config->site_url($CI->uri->uri_string());
 		}
 
-		$form = '<form action="'.$action.'"'._attributes_to_string($attributes, TRUE).">\n";
+		$attributes = _attributes_to_string($attributes);
+
+		if (stripos($attributes, 'method=') === FALSE)
+		{
+			$attributes .= ' method="post"';
+		}
+
+		if (stripos($attributes, 'accept-charset=') === FALSE)
+		{
+			$attributes .= ' accept-charset="'.strtolower(config_item('charset')).'"';
+		}
+
+		$form = '<form action="'.$action.'"'.$attributes.">\n";
 
 		// Add CSRF field if enabled, but leave it out for GET requests and requests to external websites
-		if ($CI->config->item('csrf_protection') === TRUE && ! (strpos($action, $CI->config->base_url()) === FALSE OR strpos($form, 'method="get"')))
+		if ($CI->config->item('csrf_protection') === TRUE && ! (strpos($action, $CI->config->base_url()) === FALSE OR stripos($form, 'method="get"')))
 		{
 			$hidden[$CI->security->get_csrf_token_name()] = $CI->security->get_csrf_hash();
 		}
@@ -542,12 +549,12 @@
 	 * use form_fieldset_close()
 	 *
 	 * @param	string	The legend text
-	 * @param	string	Additional attributes
+	 * @param	array	Additional attributes
 	 * @return	string
 	 */
 	function form_fieldset($legend_text = '', $attributes = array())
 	{
-		$fieldset = '<fieldset'._attributes_to_string($attributes, FALSE).">\n";
+		$fieldset = '<fieldset'._attributes_to_string($attributes).">\n";
 		if ($legend_text !== '')
 		{
 			return $fieldset.'<legend>'.$legend_text."</legend>\n";
@@ -920,45 +927,24 @@
 	 * Helper function used by some of the form helpers
 	 *
 	 * @param	mixed
-	 * @param	bool
 	 * @return	string
 	 */
-	function _attributes_to_string($attributes, $formtag = FALSE)
+	function _attributes_to_string($attributes)
 	{
-		if (is_string($attributes) && strlen($attributes) > 0)
+		if (is_string($attributes))
 		{
-			if ($formtag === TRUE && strpos($attributes, 'method=') === FALSE)
-			{
-				$attributes .= ' method="post"';
-			}
-
-			if ($formtag === TRUE && strpos($attributes, 'accept-charset=') === FALSE)
-			{
-				$attributes .= ' accept-charset="'.strtolower(config_item('charset')).'"';
-			}
-
-			return ' '.$attributes;
+			return ($attributes === '' ? '' : ' '.$attributes);
 		}
 
-		if (is_object($attributes) && count($attributes) > 0)
+		if (is_object($attributes))
 		{
 			$attributes = (array) $attributes;
 		}
 
-		if (is_array($attributes) && ($formtag === TRUE OR count($attributes) > 0))
+		if (is_array($attributes))
 		{
 			$atts = '';
 
-			if ( ! isset($attributes['method']) && $formtag === TRUE)
-			{
-				$atts .= ' method="post"';
-			}
-
-			if ( ! isset($attributes['accept-charset']) && $formtag === TRUE)
-			{
-				$atts .= ' accept-charset="'.strtolower(config_item('charset')).'"';
-			}
-
 			foreach ($attributes as $key => $val)
 			{
 				$atts .= ' '.$key.'="'.$val.'"';
@@ -966,6 +952,8 @@
 
 			return $atts;
 		}
+
+		return FALSE;
 	}
 }
 
diff --git a/system/libraries/Cache/Cache.php b/system/libraries/Cache/Cache.php
index e1089f7..537897e 100644
--- a/system/libraries/Cache/Cache.php
+++ b/system/libraries/Cache/Cache.php
@@ -106,7 +106,7 @@
 
 		isset($config['key_prefix']) && $this->key_prefix = $config['key_prefix'];
 
-		if (isset($config['backup']) && in_array('cache_'.$config['backup'], $this->valid_drivers))
+		if (isset($config['backup']) && in_array($config['backup'], $this->valid_drivers))
 		{
 			$this->_backup_driver = $config['backup'];
 		}
@@ -123,6 +123,7 @@
 			else
 			{
 				// Backup is supported. Set it to primary.
+				log_message('debug', 'Cache adapter "'.$this->_adapter.'" is unavailable. Falling back to "'.$this->_backup_driver.'" backup adapter.');
 				$this->_adapter = $this->_backup_driver;
 			}
 		}
diff --git a/system/libraries/Javascript.php b/system/libraries/Javascript.php
index 090f4c9..26a1685 100644
--- a/system/libraries/Javascript.php
+++ b/system/libraries/Javascript.php
@@ -172,7 +172,7 @@
 	 */
 	public function focus($element = 'this', $js = '')
 	{
-		return $this->js->__add_event($element, $js);
+		return $this->js->_focus($element, $js);
 	}
 
 	// --------------------------------------------------------------------
@@ -189,7 +189,7 @@
 	 */
 	public function hover($element = 'this', $over = '', $out = '')
 	{
-		return $this->js->__hover($element, $over, $out);
+		return $this->js->_hover($element, $over, $out);
 	}
 
 	// --------------------------------------------------------------------
diff --git a/system/libraries/Javascript/Jquery.php b/system/libraries/Javascript/Jquery.php
index f5fa72d..ab78e8b 100644
--- a/system/libraries/Javascript/Jquery.php
+++ b/system/libraries/Javascript/Jquery.php
@@ -923,7 +923,6 @@
 		if (is_array($js))
 		{
 			$js = implode("\n\t\t", $js);
-
 		}
 
 		$event = "\n\t$(".$this->_prep_element($element).').'.$event."(function(){\n\t\t{$js}\n\t});\n";
@@ -937,7 +936,7 @@
 	 * Compile
 	 *
 	 * As events are specified, they are stored in an array
-	 * This funciton compiles them all for output on a page
+	 * This function compiles them all for output on a page
 	 *
 	 * @param	string	$view_var
 	 * @param	bool	$script_tags
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 77cd39d..1e463db 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -601,6 +601,7 @@
 -  Fixed a bug (#249) - :doc:`Cache Library <libraries/caching>` didn't properly handle Memcache(d) configurations with missing options.
 -  Fixed a bug (#180) - :php:func:`config_item()` didn't take into account run-time configuration changes.
 -  Fixed a bug (#2551) - :doc:`Loader Library <libraries/loader>` method ``library()`` didn't properly check if a class that is being loaded already exits.
+-  Fixed a bug (#2560) - :doc:`Form Helper <helpers/form_helper>` function :php:func:`form_open()` set the 'method="post"' attribute only if the passed attributes equaled an empty string.
 
 Version 2.1.4
 =============