For some reason the inner column border style is ignored when border radius is greater than 0.
In the screenshot examples a dashed border 'reverts' in the front end to a solid border as soon as a border radius greater than 0 is selected.
I see no reason for this limitation (correcting the css to use a dashed border  works fine)

Thanks a lot for the quick reply.
I don't mind providing admin credential, but the issue is actually very easily reproducible:

1. Create a new page (or edit an existing one).
2. Open up the inner column settings of a column containing anything.
3. In the border tab, pick any border width greater than "0px" (ie "1px") and set its style to any other than "solid" (ie "dashed").
4. Preview the page, you should see a dashed border around your column content.
5. Now, open up the inner column settings again and in the "General" Tab under "Shadow & Rounded Edges" change the border radius to any value greater than "0px" (ie "15px").
6. Preview again, you will see that your dashed border is now replaced by a solid one.