WordPress released version 3.6 which includes some new features. When we released Photocrati 4.6 a few weeks ago, it included compatibility with the updated WordPress version.
It is extremely important that you update you Photocrati them to the latest version before updating WordPress.
If you stay on Photocrati 4.5.1, your website will display as normal. However, galleries can neither be created nor edited without updating to 4.6.
As always, if you experience any problems or need assistance upgrading, please contact support through the members area.