Exactly the same problem of no CSS formatting occurs with Firefox and with IE 6. The lack of formatting is for both the admin screen (Dashboard) as well as the blog display.
Both Admin and Blog pages validate as good XHTML and it source code for the main page.
The problem occurs for both Default and Classic themes. Here is a listing of the source code for the page and you can see on line 11 that it's referencing the stylesheet. This is how the source code for http://maccs2support.chaninconsulting.com displays in the XHTM validator. I've tried putting wordpress in a subfolder (chaninconsulting.com/blog) and it give me exactly the same problem.
The wordpress files for 220.127.116.11 are installed in the root of a subdomain folder: http:// maccs2support.chaninconsulting.com, as follows:
1: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2: <html xmlns="http://www.w3.org/1999/xhtml">
4: <head profile="http://gmpg.org/xfn/11">
5: <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
7: <title>MACCS2SUPPORT » Uncategorized</title>
9: <meta name="generator" content="WordPress 18.104.22.168" /> <!-- leave this for stats please -->
11: <style type="text/css" media="screen">
12: @import url( http://maccs2support.chaninconsulting.com/wp-content/themes/classic/style.css );