content alignment in block: won't align to right

Hi,

I've got a block with a views slideshow. I've set the content alignment for this block to 'Right align content within its container', but it wont't align to right. On a page reload, the image from the slideshow does align to right, but then quickly jumps back to the left (see attachment).
I've got latest versions of D7 and all modules and themes (Fusion and Acquia Marina). Is this a bug or am I doing something wrong?

Thanks,

Mike.