I only saw 2 hacks installed, but I haven't tried posting anything, so I don't know if you have any post hacks installed. The colors aren't that bad, but the logo doesn't flow with the rest of the site.
Now that I did register, I'm still not seeing these hacks you speak of.
The only one I noticed was Who's Online...
I suggest you dump your F2S hosting, because the site took
extremely long to load for me, and I have a rather fast 56k connection. (Fast in terms of 56k ;))
One last thing - the dark gray you used makes it hard to read your forum descriptions. Make it lighter or change the color completely.