Index: themes/bartik/css/style.css
===================================================================
RCS file: /cvs/drupal/drupal/themes/bartik/css/style.css,v
retrieving revision 1.49
diff -u -r1.49 style.css
--- themes/bartik/css/style.css	14 Dec 2010 19:53:14 -0000	1.49
+++ themes/bartik/css/style.css	20 Dec 2010 12:23:06 -0000
@@ -728,6 +728,7 @@
   display: table-cell;
   vertical-align: top;
   position: relative;
+  width: 100%;
 }
 .comment .indented {
   margin-left: 40px; /* LTR */
Index: themes/bartik/css/ie.css
===================================================================
RCS file: /cvs/drupal/drupal/themes/bartik/css/ie.css,v
retrieving revision 1.11
diff -u -r1.11 ie.css
--- themes/bartik/css/ie.css	14 Dec 2010 02:50:24 -0000	1.11
+++ themes/bartik/css/ie.css	20 Dec 2010 12:23:05 -0000
@@ -19,10 +19,11 @@
   overflow: hidden;
   padding: 0;
 }
-.comment-text {
+.comment .comment-text {
   display: inline;
   float: left; /* LTR */
   margin-left: 25px; /* LTR */
+  width: auto;
 }
 #search-block-form input.form-submit,
 #search-form input.form-submit {