Index: bp-themes/bp-default/groups/single/group-header.php
===================================================================
--- bp-themes/bp-default/groups/single/group-header.php	(revision 3107)
+++ bp-themes/bp-default/groups/single/group-header.php	(working copy)
@@ -35,7 +35,7 @@
 	<div id="item-meta">
 		<?php bp_group_description() ?>
 
-		<?php if ( bp_is_group_forum() && is_user_logged_in() ) : ?>
+		<?php if ( bp_is_group_forum() && is_user_logged_in() && !bp_is_group_forum_topic() ) : ?>
 			<div class="generic-button group-button">
 				<a href="#post-new" class=""><?php _e( 'New Topic', 'buddypress' ) ?></a>
 			</div>