HOTFIX; The system stops responding when you access a Web page or open an HTML document on a Windows XP SP2 based computer
When you use Microsoft Internet Explorer 6 to access a Web page or to open an HTML document on a Windows XP SP2-based computer, the system stops responding. Additionally, you notice that the CPU usage is almost 100%.
This issue may occur if the Web page or the HTML document has a RUBY element. For example, when you open the Web page by using the HTML editor, some lines of the source code resemble the following:
<ruby>123<rt style='layout-grid-mode:line'>abc</rt>A</ruby>
When Internet Explorer 6 parses the line that contains the RUBY element, an infinite loop occurs. The infinite loop causes this problem.
http://support.microsoft.com/default.aspx/kb/908917