Apostrophes in text fields fucking up

I think this goes here more than in /comp/.

I have a simple html template with a few text fields to fill up. When I enter apostrophes ' in the text field, it gets converted to \' in the finished page. The pages seem to be utf-8 encoded, and I have no control over this (it's a template for an auction site). Apostrophes that are in the template itself are unaffected.

I tried pasting text there with various encodings, but neither helped. What am I doing wrong?

                       //`'''```,
             o        //LISP   `.,
       ,....OOo.   .c;.',,,.'``.,,.`
    .'      ____.,'.//
   / _____  \___/.'
  | / ||  \\---\|
  ||  ||   \\  ||
  co  co    co co
Use it; PHP is not Touring-complete.