I have installed the latest version of WP along with the MiniMatica theme. It seems there is a problem if your postings are not a multiple of 4 as the featured image( slider) is not shown correctly and properly.
For example, I just posted only one and only one posting under this theme with the associated featured image and it is shown cropped and not in its full dimension (which seems should be the case) . Can you please help?
That is a known bug that will be fixed in the next version, thank you for your feedback.