Index: wp-content/themes/twentytwelve/style.css
===================================================================
--- wp-content/themes/twentytwelve/style.css	(revision 21432)
+++ wp-content/themes/twentytwelve/style.css	(working copy)
@@ -197,12 +197,13 @@
 .menu-toggle,
 input#searchsubmit,
 article.post-password-required input[type=submit],
-li.bypostauthor cite span {
-	padding: 1px 10px;
-	padding: 0.071428571rem 0.714285714rem;
+li.bypostauthor cite span,
+#commentform #submit {
+	padding: 6px 10px;
+	padding: 0.428571429rem 0.714285714rem;
 	font-size: 11px;
 	font-size: 0.785714286rem;
-	line-height: 2.181818182;
+	line-height: 1.428571429;
 	font-weight: normal;
 	color: #7c7c7c;
 	background-color: #e6e6e6;
@@ -218,12 +219,14 @@
 }
 .menu-toggle,
 input#searchsubmit,
-article.post-password-required input[type=submit] {
+article.post-password-required input[type=submit],
+#commentform #submit {
 	cursor: pointer;
 }
 .menu-toggle:hover,
 input#searchsubmit:hover,
-article.post-password-required input[type=submit]:hover {
+article.post-password-required input[type=submit]:hover,
+#commentform #submit:hover {
 	color: #5e5e5e;
 	background-color: #ebebeb;
 	background-repeat: repeat-x;
@@ -237,7 +240,8 @@
 .menu-toggle.toggled-on,
 input#searchsubmit:active,
 article.post-password-required input[type=submit]:active,
-input#searchsubmit.toggled-on {
+input#searchsubmit.toggled-on,
+#commentform #submit:active {
 	color: #777;
 	background-color: #e1e1e1;
 	background-repeat: repeat-x;