Background color extends beyond wrap_width

[crahan]

Hi,

I've been using the MarkdownEditor.tmTheme which sets draw_centered to true, wrap_width to 70 characters and word_wrap to true. Blocks of text indented by 4 characters get their own background color, but it appears that the background color extends beyond the word_wrap limit. Is there any theme setting or option to disable this behaviour so the background color stops at the word_wrap edge?

Please see http://i46.tinypic.com/24wc96e.jpg for an example.