I'm saving my files with UTF-8 with no BOM to get around "headers already sent" issue. However I get strange characters in the whole site, I don't know why since saving files the same in other sites don't cause the same issue.
I get this: 
a lot of times in random spots of my site and some special characters are displayed incorrectly.
http://chusmix.com/?ciudad=Pilar
How can I fix this?