Index: themes/bartik/css/style.css
===================================================================
RCS file: /cvs/drupal/drupal/themes/bartik/css/style.css,v
retrieving revision 1.17
diff -u -r1.17 style.css
--- themes/bartik/css/style.css	24 Sep 2010 01:36:30 -0000	1.17
+++ themes/bartik/css/style.css	26 Sep 2010 23:35:20 -0000
@@ -1168,6 +1168,8 @@
 #search-form input#edit-keys,
 #block-search-form .form-item-search-block-form input {
   float: left; /* LTR */
+  font-size: 0.929em;
+  height: 1.143em;
 }
 #search-block-form input.form-submit,
 #search-form input.form-submit {
@@ -1179,9 +1181,16 @@
   cursor: pointer;
   text-indent: -9999px;
   border: 1px solid #ccc;
-  background: url(../images/search-button.png) no-repeat center center;
+  background: url(../images/search-button.png) no-repeat center top;
   overflow: hidden;
 }
+#search-block-form input.form-submit:hover,
+#search-block-form input.form-submit:focus,
+#search-form input.form-submit:hover,
+#search-form input.form-submit:focus {
+  background-position: center bottom;
+  border-color: #bbb;
+}
 #search-form .form-item-keys label {
   display: block;
 }