OK I really feel a bit stupid here... I just wanted to upgrade the firmware via the webinterface, like I always did, but now the upload form is... gone... I checked all the Advanced settings for something like "disable firmware upgrade", although I cannot remember ever having seen such an option.
So can someone just tell me whats the matter here? I am really confused
Edit: I should meniton I already rebooted the system twice, like the text says