Here in this article:

http://www.nickhodges.com/post/More-on-FreeAndNil.aspx#comment

should you scroll lower, you'll find that the nested surveys are getting bigger. I am not too wise on CSS, but clearly some element is building on itself.

Any applying for grants what's leading to this or the way i might start monitoring it lower?

within this file: http://www.nickhodges.com/themes/BlueHorizon/css.axd?name=style2.5.0.6.css

Your comment class has font-size:110%; property onto it.

A simple fix is always to produce a new CSS rule:

.comment .comment {
    font-size: 100%;
}

Although cleaning the code could be better still.