So I can't determine if my site has been hacked, whether I have local PC/browser settings wrong or not, but ... Having loaded zenphoto with the latest version (as it happens zp-ardoise theme) I am getting chinese characters for the system elements (e.g. "prev", "next", "login", etc). I thought this may be to do with my browser (Firefox), but IE is now showing it as well. I tried an alternative PC , and that showed the english character set I was expecting, for that period of time.
The admin area does not show a language setting that would influence this far as I can tell. Re-running setup, and changing the character set there only lasts a few minutes before reloading sees the chinese character set once again.
Not sure if this is paranoia, incompetence, or genuine victim-mode. See `http://marklcaton-images.co.uk/zenphoto/`.