My index.htm page is a table layout with biligual header and footer, engish language links down the left and arabic language links down the right, with a large central I-frame into which I fire pages, either english or arabic. I've individually validated all the content pages as 4.01 Transitional, but can't validate the index page itself. This seems to be because I need the height="100%" attribute in the <table> tag, and 4.01 disallows it. I can't use 3.2 because it disallows dir="rtl" and lang="ar" in the <html> tag. It all seems to work in everything except Mac IE. As we are a technology company, I feel we really should validate everything. I'm too far down the line to rework the whole site, so any pointers gratefully received. Thanks.