I am just learning CSS and what I was taught yesterday is instead of updating IE6 for CSS they installed everything in 7. So you need to upgrade to 7 to fix the problems.
Why should the TD inherit the style from the TR instead of the entire row having the single style? That's like taking nested DIVs and have each DIV have the same style as the parent DIV.
2014 is going to be a good year. More content, more streamlining. Be a part of history!