Hi,
I found a bug after upgrading from APEX 5.0 to APEX 5.0.1.
I implemented a report region using "Cards" theme with following "Template Options":

I used an image, instead of an icon, and it showed my image with rounded borders (cropping image to a perfect circle).
After upgrading, it shows the whole image (without rounded borders).
I found a workaround which was chaning "Icons -> Display Icons" to "Icons -> Display Initials" and it displays with rounded borders again.