Firefox 3, but it was the same thing in IE7. Something is wrong here if it looked the same in both of them ;)
In the content, yes, there are the same arrows; I also had some submenus in the left mainmenu, where I got a small circle in front of every submenu entry. Found something in Google's cache if you could take a look
209.85.135.104/search?q=cache:tCQ0JI6azo...amp;
client=firefox-a
Though I consider the problem solved. Really don't know how; I emptied the cache in browsers, in joomla too, stoped the caching, started the caching, restarted apache, checked in Linux&Windows etc They were there