"maxlength" is not a valid attribute for input element of type "number" in html5.

lib/Cake/Test/Case/View/Helper/FormHelperTest.php

@@ -748,7 +748,7 @@ class FormHelperTest extends CakeTestCase {
 			'type' => 'float',
 			'null' => false,
 			'default' => null,
-			'length' => null
+			'length' => 10
 		)));
 
 		$this->Form->create('Contact');
@@ -1841,7 +1841,7 @@ class FormHelperTest extends CakeTestCase {
 			'label' => array('for'),
 			'Balance',
 			'/label',
-			'input' => array('name', 'type' => 'number', 'maxlength' => 8, 'id'),
+			'input' => array('name', 'type' => 'number', 'id'),
 			'/div',
 		);
 		$this->assertTags($result, $expected);

lib/Cake/View/Helper/FormHelper.php

@@ -1242,13 +1242,10 @@ class FormHelper extends AppHelper {
 			$options['type'] !== 'select'
 		);
 		if ($autoLength &&
-			in_array($options['type'], array('text', 'email', 'tel', 'url'))
+			in_array($options['type'], array('text', 'email', 'tel', 'url', 'search'))
 		) {
 			$options['maxlength'] = $fieldDef['length'];
 		}
-		if ($autoLength && $fieldDef['type'] === 'float') {
-			$options['maxlength'] = array_sum(explode(',', $fieldDef['length'])) + 1;
-		}
 		return $options;
 	}