CSS Inactive

I have been having an issue lately with BM Custom Login where the login form does not sit where it used to. I have not altered anything with the login or the plugin.

I did some research and think I have narrowed down the issue.

When I updated WordPress to version 3.6 it makes the .css file associated with BM Custom login, inactive. I believe that it is compiling this into another stylesheet, however, the login form is now appearing as a jumbled mess. I am rather lost as to what the issue is because I did not alter the image or css associated with the form.

Your thoughts are appreciated. Thanks in advance.

Dave

http://ww.wp.xz.cn/plugins/bm-custom-login/