The above error has been fixed in the nightly builds.

Thanks sbillard!
Indeed it works in the latest nightly.
I thought that v1.4.1.1 was updated with the latest fixes, but quite a few differences.

Anyway, with the "enable persistent archives" option checked and using printAlbumZip(); I can't find the zipfile anywhere though. Where should the zip be written?

I believe it goes into the folder that contains the album.

{edit] 1.4.1.1 is the latest release build, but the Trunk nightly builds contain any fixes generated post the release.