Whenever I create a PDF file from an HTML document, I get: these characters at the top of the PDF document:

I tried changing the character set, and that does affect the strange characters, but they always remain. I've tried using your example HTML as well as something as simple as:
<html><body>Test</body></html>
but the characters are always there - it doesn't matter if I use the GUI or the command. The only time they aren't there is if I use the URL (like your site), then they don't appear in the PDF.
Do you know what I'm doing wrong?
test2.pdf