Button text (Kontakt, AGB, etc.) in the menu is aligned to left in Opera or Firefox, looks non-standard. If it is not a bug, then my suggestion will be to align button text to center.
Page has "bands" (1) header (2) menu (3) sales pitch (4) HUGE load of text/pics (5) footer. About the only thing that ties anything together is the colour black - so there's no visual harmony as you go down the page. Secondly, given the average user's reluctance to scroll, most of the text would better be moved to other pages.