Mahara 1.4 dev version:
I would switch a couple of elements around on the share access page to make it easier to see. In Western culture we read from left to right. Thus, having the important column with page and collection titles in the middle is a bit weird because you have to focus your attention in the middle and then go to the left to see the access list.
I propose the following (see attached mockup):
1. make the Pages & Collections column the first one and then have access list and edit access
2. move the number of secret URLs closer to the edit button
3. substitute the pencil button for the key button for the secret URL for consistency; besides: a secret URL can only be generated and not edited; I think the key would be more appropriate as it shows access
In addition, it would be good to be able to distinguish between collections and pages easily, e.g. collections in bold (as they contain a number of pages).