Display: too big box for thumbnails

[Frieki]

Hi
My thumbnails (being small) are displayed in a very big box with another white box inside.

I tried to change the display changing parameters, without success. What can I do? Look here:
URL

Thanks

[Jan]

Did you change the size of the image in the frontend (menu links parameters). If not, try to change the template (in case you didn't make some changes of image sizes)