I do try and be critical when I see something that doesn't seem quite right - not only for me, but for 'the audience'.
Howver, I love these gray, muted styles. Truly, I'm going to find much to critique in this type of style.
I would say that, in the navbar, the muting of the gray text is so close to the background that a rollover is needed for these old eyes to actually read it. The point size of your 'blockquote' text is so small, I'd probably skip it - or, use "Control +" in Firefox. Having to increase text size that way used to bother me - but, now I'm 'trained' to do it. So, not a big deal.
You have ample white space. Navigation (except the gray text) is functional and easy to use. The design is a bit understated (which I like) and then, there is the flash. Well, it loaded in 2 secs. on my broadband. Although, in your site's case (re: the posts you've made and content) it is not superfluous. The photos match the topics. Plus, when clicking the nav bar - you get a different picture at each screen. That's cool. It renders equally well in Firefox and IE on my computer.
I love - not just like - the style.
This is, yet another of, the type of site style I'd like to see 'zipped' up and offered to the community. The theme alone - or with a '.fla' file for adding your own photos - would be the ultimate kindness. ;o)
Regardless of whether it is shared - still, the site is very nice. Congrats.