We're using Zoomify Enterprise, HTML5 edition, in D7. Generally it's working fine, but the size of our original images varies greatly - some are not much more than thumbnails. At the moment these are being stretched oversize when the image is viewed in Zoomify.

What I'd like is for an image to never be shown at more than 100% of the original size. I've found a setting at http://www.zoomify.com/support.htm#a20081222_2050 which looks as if it should work:
xmlParamsMap["MAXZOOM"] = "zoomifyMaxZoom";
However, setting this parameter to 100% (or even 10%) in admin/config/media/zoomify doesn't make any difference. Is it supposed to do what I want? Is there a bug of some kind?

The option settings I've enabled in the Drupal interface (admin/config/media/zoomify) are:
zToolbarVisible=1&zNavigatorVisible=1&zoomifyMaxZoom=100%
and the first two parameters are working correctly.

I've emailed support@zoomify.com and will add to this if there's any feedback, but wondered if there was something Drupal-specific that I was doing wrong.