Current CSS markup broke checkboxes in Opera 9.64

[maxd]

Hello,

Problems:

1. checkboxes has width as text fields
2. checkboxes doesn't show mark (V)

Steps to reproduce:

1. Install test_formtastic_sass
2. Open app/view/post/_form.html.haml and add the following input:

= f.input :category, :as => :boolean

1. Open this form in Opera browser