Andrew, thanks a lot for your fast response. At least this isn´t really a problem for the workflow – the theme works fine and looks really great! It´s just the “update-symbol” in the WP-Backend that suggests to have forgotten something ;) …
I think the problem isn´t with your theme, there´s another theme directly on the wordpress-server called “origami” and WP thinks i´m running that due to the same name. That´s the same link WP wants to download the update in the Backend.
Take a look at this:
http://wordpress.org/extend/themes/origami
I´m fine with your solution!
Sincerely,
Michael