Sorry if this is a n00bie question.
I am using the catch-box theme and want to set my post thumbnails to be square.
However it seems that set_post_thumbnail_size() is already being called in functions.php to set the (rather large) header image size, and that I therefore can't use a smaller default thumbnail size.
Does this mean that I have to create a hacky kludge to get my thumbnails on my posts to look the way I want them to, by setting up a new thumbnail size using add_image_size() and naming it something like real-post-thumb?
Thanks for advice -- just trying to make my site look great, thanks for a nice theme!