When i try to authorize on project-gc.com using Google Chrome and I'm already logged in to geocaching.com, then I'm stuck in a redirect loop and the following page is shown:
To be able to authorize I have to go to geocaching.com, log out and then go to project-gc.com and authorize again.
Also, every day I go to Project-GC I need to authorize. It doesn't remember between sessions. I don't have any special cookie settings for Project-GC and my logins are rememberd on other websites.