buddypress masthead problem

Hi, leisadent!

Its reason is that, you have used Internal Style on your above mentioned second link i.e.

<style type="text/css">
    #header { background-image: url(https://www.alexandradesign.com.au/businesscardblog/wp-content/uploads/2011/12/masthead-business-card-blog.jpg); }
#header h1, #header #desc { display: none; }
</style>

So, Its quick solution is that, copy above mentioned code and paste it in your first link where the image is not being loaded.

The best practice to get rid of this type of issues is that, you make a common style sheet file, and used its ID or Classes anywhere you want in your site.

Hope, the above mentioned solution will work for you.