The exclamation mark is because there is not included any metacity theme in this pack and I forgot to remove the line where is specified which metacity theme i'm using. The background of your tray icons doesn't look right because it is a bug, let me check my code and i will fix that as soon as i can. Even your back/forward buttons look stretched, they work perfect with other people sorry but I could'nt figure out what is happening with yours.