mamba please, update your package for tinymce with new structure folder (class/xoopseditor/tinymce/tiny_mce/.. and not class/xoopseditor/tinymce/tinymce/js/tiny_mce/..)
<{php}>
$language = $GLOBALS['xoopsConfig']['language'];
if(file_exists(XOOPS_ROOT_PATH.'/language/'.$language.'/style.css')){
echo "<link rel=\ "stylesheet\ " type=\ "text/css\ " media=\ "all\ " href=\ "language/$language/style.css\ " />";
}
<{/php}>
<!--[if lt IE 8]>
<style type="text/css" media="screen">#xo-canvas-leftcolumn {display: inline; zoom:1; width:180px;}
#xo-page {display: inline; zoom:1; width:462px;}
#xo-canvas.threecolumns-layout #xo-page { width:462px;}
#xo-canvas.leftcolumn-layout #xo-page, #xo-canvas.rightcolumn-layout #xo-page {width:810px;}
#xo-canvas-rightcolumn {display: inline; zoom:1; width:180px;}
</style><![endif]-->