help with messy comment area (aggregate theme)

Hi, i use the commercial theme aggregate, I have modified it a bit and it seem that the comment are looks messy. If anyone could find the problems, it would be highly appreciated.

Thanks!

here is a post with some comments:
https://www.kiljano.se/2011/11/vandring-kring-grovelsjon/

Here is the code:

[CSS code moderated – a link to your site is enough to access the styles]