On the home page the problem is not as bad, partly because the topic headers are bolded and larger font. But the intensity of the blue bars or the width is creating such a contrast against the white background it is causing eye strain.
On the topics page are headers bolded but a smaller font and against the white is very difficult to read.
Its just too much bright blue and bright white. And the font does appear smaller on my monitor. Is it a trick of the eye because of the color choices, I have no clue. I just know that it hurts to be on this site for more than a couple of minutes. Much of this could be solved by changing to black or finding a way to tone down the white. Enlarging the fonts on topics pages.
I'm sorry, visually, this site is not the same as the old one for me. I use both FF and IE and they appear the same on both.
2nd this, I don't think it's just your monitor. I am having the same problem where it hurts just to look at the page.
I completely understand the need for a new platform, but perhaps the colors could be toned down to make them more eye friendly.