Several errors after rake generate on _syntax.scss

[gtcarlos]

Hello,

I'm trying to install the theme (using submodule install) into my blog but after

rake install['MediumFox']

When I try to rake generate I've got the following errors:

## Generating Site with Jekyll
directory source/stylesheets/base/bootstrap/ 
WARNING on line 74 of /home/gtcarlos/Blog/octopress2/sass/base/_syntax.scss: "html .gist .gist-file .gist-meta" failed to @extend ".sans".
  The selector ".sans" was not found.
  This will be an error in future releases of Sass.
  Use "@extend .sans !optional" if the extend should be able to fail.

WARNING on line 96 of /home/gtcarlos/Blog/octopress2/sass/base/_syntax.scss: "pre" failed to @extend ".mono".
  The selector ".mono" was not found.
  This will be an error in future releases of Sass.
  Use "@extend .mono !optional" if the extend should be able to fail.

WARNING on line 112 of /home/gtcarlos/Blog/octopress2/sass/base/_syntax.scss: "p code" failed to @extend ".mono".
  The selector ".mono" was not found.
  This will be an error in future releases of Sass.
  Use "@extend .mono !optional" if the extend should be able to fail.

WARNING on line 112 of /home/gtcarlos/Blog/octopress2/sass/base/_syntax.scss: "li code" failed to @extend ".mono".
  The selector ".mono" was not found.
  This will be an error in future releases of Sass.
  Use "@extend .mono !optional" if the extend should be able to fail.

[camdez]

I get the same (using the other installation method). Though it's probably worth noting that those are warnings, not errors.

[bertuz]

I got the same, everything seems to be OK though

[Jacubeit]

same here, works fine, but a little confusing in terminal

[alexeyza]

same here.