In the resources page, the you should request for resource banner - if author wont add, banner will set us the default polymart banner.
in the profile - you should add a disabled button, I can still click the "Update my Profile Image" button even if I have not uploaded any images, same for profile banner.
In the Profile, - Please tell us what is the minimum size for profile image and for the profile banner
In the Profile - Maybe add Information Tab, Resources Tab, Recent Activity, Last Seen. Maybe add option to follow authors to get updated for updates / new resources?