its really hard to see the new thread buttons etc.
Your body background should be:
background: #2e5db1 url(http://i.imgur.com/sNhMk.jpg) no-repeat;
Also, since you aren't using cellspacing, tborder needs background: transparent; else you can see white on the corners of your tables.
And yeah, can't read any of your postbit buttons without feeling pain. Try white as the text color.