Google Adsense does not display advertising on Bad Request 400

I had on my Earning Website das Problem, I 5 Adsense banners have added in different formats. Of which have 2 Banners will not work on Firefox and you could see, that the banner javascripts with error code 400 Bad Request loaded.

Adsense Bad Request 400 with Firebug plugin

To solve the problem, I have removed all non-displayed banner from the website and pasted individually. The result was, that a skyscraper banner did not work, because it is partially displayed in another and was not loaded because of.

The solution is to be found so the evil banners and all other work after the removal of the offender.