Hi,
i made the following change to func.inc to avoid the indentation:
instead of:
$out .= "\n<ul>\n" . rcmail_render_folder_tree_html($folder['folders'], $special, $mbox_name, $maxlength,
I use:
if (!empty($folder['folders']) && $folder['id'] != 'INBOX')
$out .= "\n<ul>\n" . rcmail_render_folder_tree_html($folder['folders'], $special, $mbox_name, $maxlength, $nestLevel+1) . "\n";
else $out .= rcmail_render_folder_tree_html($folder['folders'], $special, $mbox_name, $maxlength, $nestLevel);
It is a little ugly but it does the trick.