Hi,
I am also having issues with the slider image, i have tried using the custom css but the image still doesnt show.
its seems to be resizing the image and centralizing it with black on both the left and right.
ideally it would be great if it could simply take the featured image and run it at its size because if a screen grab the page and crop to the slider it tells me the size is 930 x 400.
which i crop my images to fit this and it still doesnt pull them to the actual size.
i also wonder why it is that your template doesnt also show the featured image on the actual post, every other theme i have worked with pulls the feature image to the slider (and never had issues like this) and also keep the featured image to show above the headline on the actual post.
another thing i dont like about the theme is that when you click a category it by default is saying archives for xxxx (xxx been the category) when ideally i just want it to have the category name.
finally i have applied custom colors to my categories, but in the primary menu you cant do this unless you create a custom menu.
if you leave it as default it only shows categories that have posts assigned to them which is great because you dont want dead pages. but you cant assign a color.
the only way i think you can assign a color to show is making a custom primary menu which you manually add the categories but if at a later date there is no posts for that category it will remain in the menu.