Index: wp-admin/includes/class-wp-users-list-table.php
===================================================================
--- wp-admin/includes/class-wp-users-list-table.php	(revision 22147)
+++ wp-admin/includes/class-wp-users-list-table.php	(working copy)
@@ -145,7 +145,7 @@
 			<option value=''><?php _e( 'Change role to&hellip;' ) ?></option>
 			<?php wp_dropdown_roles(); ?>
 		</select>
-		<?php submit_button( __( 'Change' ), 'small', 'changeit', false ); ?>
+		<?php submit_button( __( 'Change' ), 'button', 'changeit', false ); ?>
 	</div>
 <?php
 	}
Index: wp-admin/css/wp-admin.css
===================================================================
--- wp-admin/css/wp-admin.css	(revision 22147)
+++ wp-admin/css/wp-admin.css	(working copy)
@@ -852,6 +852,10 @@
 	width: 200px;
 }
 
+.tablenav #changeit {
+	margin-top: 1px;
+}
+
 #wpcontent option {
 	padding: 2px;
 }