Index: wp-admin/includes/meta-boxes.php
===================================================================
--- wp-admin/includes/meta-boxes.php	(revision 20893)
+++ wp-admin/includes/meta-boxes.php	(working copy)
@@ -356,7 +356,7 @@
 						<?php echo $tax->labels->parent_item_colon; ?>
 					</label>
 					<?php wp_dropdown_categories( array( 'taxonomy' => $taxonomy, 'hide_empty' => 0, 'name' => 'new'.$taxonomy.'_parent', 'orderby' => 'name', 'hierarchical' => 1, 'show_option_none' => '&mdash; ' . $tax->labels->parent_item . ' &mdash;', 'tab_index' => 3 ) ); ?>
-					<input type="button" id="<?php echo $taxonomy; ?>-add-submit" class="add:<?php echo $taxonomy ?>checklist:<?php echo $taxonomy ?>-add button category-add-sumbit" value="<?php echo esc_attr( $tax->labels->add_new_item ); ?>" tabindex="3" />
+					<input type="button" id="<?php echo $taxonomy; ?>-add-submit" class="add:<?php echo $taxonomy ?>checklist:<?php echo $taxonomy ?>-add button category-add-submit" value="<?php echo esc_attr( $tax->labels->add_new_item ); ?>" tabindex="3" />
 					<?php wp_nonce_field( 'add-'.$taxonomy, '_ajax_nonce-add-'.$taxonomy, false ); ?>
 					<span id="<?php echo $taxonomy; ?>-ajax-response"></span>
 				</p>
Index: wp-admin/press-this.php
===================================================================
--- wp-admin/press-this.php	(revision 20893)
+++ wp-admin/press-this.php	(working copy)
@@ -524,7 +524,7 @@
 									<?php echo $tax->labels->parent_item_colon; ?>
 								</label>
 								<?php wp_dropdown_categories( array( 'taxonomy' => 'category', 'hide_empty' => 0, 'name' => 'newcategory_parent', 'orderby' => 'name', 'hierarchical' => 1, 'show_option_none' => '&mdash; ' . $tax->labels->parent_item . ' &mdash;', 'tab_index' => 3 ) ); ?>
-								<input type="button" id="category-add-submit" class="add:categorychecklist:category-add button category-add-sumbit" value="<?php echo esc_attr( $tax->labels->add_new_item ); ?>" tabindex="3" />
+								<input type="button" id="category-add-submit" class="add:categorychecklist:category-add button category-add-submit" value="<?php echo esc_attr( $tax->labels->add_new_item ); ?>" tabindex="3" />
 								<?php wp_nonce_field( 'add-category', '_ajax_nonce-add-category', false ); ?>
 								<span id="category-ajax-response"></span>
 							</p>