Weekend riddle 3

Question: what is wrong here?

 

Solution comes on sunday evening

 

And the solution is: there is no window here, it's a big poster:

www.flickr.com/photos/wolfgang-kynast/16870445836/

But the window exists in another building of this company.

 

It seems that the question was too simple this week - I'll do my very best for the next one :-)

Done