Body Text issues with Corporate Theme 1.2

I'm using the Corporate theme on my BP site:
http://www.businessenglish360.com/

For some reasons all the body text on blog posts, member/group profiles is displaying in bold (CSS and an unescaped <b> tag would seem to be the problem but no one has touched the CSS so far):
http://www.businessenglish360.com/business-english/be360-first-job-interviews-experience/

There is also an issue with the text colour on the sidebars on groups/blog pages. The theme displays sidebar widget titles in white text (on the WPMU theme demo as well), making the text almost invisible on the corporate-light.css version of the theme.