Index: wp-admin/js/edit-comments.dev.js
===================================================================
--- wp-admin/js/edit-comments.dev.js	(revision 18619)
+++ wp-admin/js/edit-comments.dev.js	(working copy)
@@ -357,7 +357,7 @@
 			c = $('#comment-' + this.cid);
 
 			if ( typeof QTags != 'undefined' )
-				QTags.closeAllTags('replycontent');
+				QTags.clearButtonStates('replycontent');
 
 			if ( this.act == 'edit-comment' )
 				c.fadeIn(300, function(){ c.show() }).css('backgroundColor', '');
Index: wp-includes/js/quicktags.dev.js
===================================================================
--- wp-includes/js/quicktags.dev.js	(revision 18619)
+++ wp-includes/js/quicktags.dev.js	(working copy)
@@ -538,6 +538,18 @@
 		btn.callback.call(btn, '', ed.canvas, ed);
 	};
 
+	qt.clearButtonStates = function(editor_id) {
+		var ed = this.getInstance(editor_id), button, element, tbo = ed.openTags;
+
+		if ( tbo ) {
+			while ( tbo.length > 0 ) {
+				button = ed.getButton(tbo[tbo.length - 1]);
+				element = document.getElementById(ed.name + '_' + button.id);
+				button.closeTag(element, ed);
+			}
+		}
+	};
+
 	// the link button
 	qt.LinkButton = function() {
 		qt.TagButton.call(this, 'link', 'link', '', '</a>', 'a');