I did a fresh wordpress install (WP 3.0.1, Dutch language) for a new site, and installed Atahualpa 3.4.9 almost straight away - I created some (mostly empty) pages and installed some plugins.

When I want to go to Atahualpa Theme Options I just get a page of 3 PHP errors:
PHP Warning: Invalid argument supplied for foreach() in E:\comop.nu\wwwroot\wordpress\wp-content\themes\atahualpa\functions\bfa_ata_admin.p hp on line 459
PHP Warning: Invalid argument supplied for foreach() in E:\comop.nu\wwwroot\wordpress\wp-content\themes\atahualpa\functions\bfa_ata_admin.p hp on line 459
PHP Warning: Invalid argument supplied for foreach() in E:\comop.nu\wwwroot\wordpress\wp-content\themes\atahualpa\functions\bfa_ata_admin.p hp on line 459

I disabled all plugins, but that doesn't help. Then I deleted all plugins, and that didn't help either. The site renders normally, I think, although the drop menus look a little off.

Tried deactivating/reactivating, uninstalling/reinstalling, checking on 2 different (Windows) computers in Chrome/IE/Firefox, and nothing makes any difference. Like I mentioned, I'm starting fresh, not upgrading or importing/exporting any options.

Googling didn't help - many sites apparently have error logs containing this warning, but nobody talks about it otherwise.

Could the problem be the Dutch version? Can't imagine, but I'm out of ideas, and I'm hoping you have some. The whole theme is useless this way, and I don't want to go looking for another theme when I know this one works fine on my other site.

So, I installed the latest version, and now everything works.

I figured that the version Wordpress told me to download would be safest/least buggy, but apparently not.