Frontpage demo box problem

Hello, i have a problem with frontpage demo line in the home page of the template. I don't know why but it add few pixel at the top7 box on the right and 1px on the last box of th line.
Basically all the line now is smaller of 3pix but every box have problem compared to the one of the demo.
the first 1 have same image size but the box is bigger of few pix.
the second one is smaller both image and box
the tird one is also smaller both image and box
the fourth is smaller of 1 pix the image but the box is bigger of 1px



any idea what I can corrupted?

cheers,

Roberto

fixed... or sort of.
I've fix changing the thumbnails measure width in the box 1 and 4 in the module... but i've never touch those value so now i'm wondering... how...