It's getting there but not complete.
As I mentioned on yours site alignment issues will exist because of the left and right columns thoughout the site. What's occuring is postbit content is forcing the Username column to collapse even with a "nowrap" insert after width="175". As a side-effect, you'll get a horizontal scrollbar too. With smaller resolutions the content will indeed squeeze.
One option is to set an overflow in messagearea column to prevent any content exceeding the column's width. However, because the layout is a 95% width setting for those who have wider screen resolutions there will be blank areas in the message column.