I have done a search this time and it comes up with rotating photo based on EXIF from (potentially) 1.1 onwards, but I was wondering (since I haven't found it yet) whether Zenphoto does already have 'manual' rotate built-in? Thanks

Its not done yet, but this looks pretty simple: http://discomoose.org/2006/04/28/rotating-pictures-with-php/

I just want chime in, that an auto image rotation hack is direly needed for my gallery.

I don't really need the full EXIF data, but image rotation based on EXIF is essential to make sure uploading pictures and have them display right.

If someone can come up with a quick hack, it'll tide me over til the feature is fully implemented in the main code.