OK, but my wider point is that the installation process is unintuitive and difficult to find answers to problems. Here's what I see on clean install having followed the very brief included README - http://i.imgur.com/3IcnK.png
I know what I'm doing - installed hundreds of scripts - and it's daunting.
I then follow the README to http://www.zenphoto.org/2008/08/installation-and-upgrading/ and there is no mention of permissions or how to address any of the issues I've encountered. My hosting is 'standard' shared hosting. I've installed many scripts without problems there, so I guess I'm not alone in seeing this.
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Back to specifics: do I set *every* file and folder 777? Is that not a security risk?
I've set everything 777 - now I see 'File/Folder Permissions [are loose (0777)]' and 'Zenphoto core file permissions [not correct]'. Again, I'm stuck with no clues in the documentation that I can find.
I get a warning about 'PHP magic_quotes_gpc [is enabled]' and 'You should consider disabling magic_quotes_gpc. For more information See #25 of the Zenphoto troubleshooting guide.'. Can't find "#25" on the website. Stuck again (although I found the fix by Googling).
I get 'PHP gettext() support [is not present]'. No clues given on if this important or how to fix it.
I get 'Zenphoto core file permissions [not correct]' and 'Setup could not set the one or more components to the selected permissions level. You will have to set the permissions manually. See the Troubleshooting guide...'. The linked guide gives no clues on which "components" are the problem or what to change them to. I'll ignore it and hope!
Also, the 'uploaded' directory that is created by the install process cannot be deleted or CHMODed by me on shared hosting. I need to contact my host admin. Same for robots.txt and .htaccess. That's a real nuisance.
My install seems to be working OK now - but it was painful getting there with all the uncertainties!
HTH.