UTF-8 no BOM gets strange random characters around site

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 开发者_如何转开发in random spots of my site and some special characters are displayed incorrectly.

http://chusmix.com/?ciudad=Pilar

How can I fix this?

 is the BOM so it probably hasn't been removed properly. To completely remove it, you could batch process all your files - check if the first characters match the BOM and if so, remove it. There are plenty of scripts on the internet to do that. For example: Using awk to remove the Byte-order mark