I created some simple HTML/CSS templates to use for creating PDF files for dynamically-driven reports. When I look at the templates as HTML files in my browser, the tables look fine, but after they're converted to PDFs, all the ths and tds have double lines like in the screenshot. I can insert a css reset stylesheet into the template and it clears it up - but that messes up the other styles. What are the specific resets I need to fix this?