1. Upgraded to the latest trunk and found the captcha fce is integrated. However an URL link is wrong. I've got zen installed in the /photo folder so URL to an image should be website.tld/photo/cache/code_xyz.png instead of website.tld/cache/code_xyz.png.

2. I don't see any album images in the archive view. I can only see a clickable square ...

Thanks for noting this. It will be fixed in tonight's build.