nsutterby
Hi
Homepage has Slideshow position in the feature intro layout.
On the other side in default layout you applied the module to masthead module position that will use a different style.
Do this :
Open template folder/tpls/feature-intro.php
Copy the slideshow block code and paste it in default.php file that you used for all other pages.
in this way you will see the slideshow module position in your default template style as well and module will work fine.
Regards