If it happens to you when using hotstart instalation, go to your module manager and find the zoomer module. Edit the images:
Your img address probably looks like this:
/demo_events25/images/stories/demo/zoomer/hall3.jpg
Remove the
/demo_events25 and turn it into this:
/images/stories/demo/zoomer/hall3.jpg
EDIT:
An even better tip, use the image's full address
Code:
http://www.mysite.com/blablablablabla/image.png
It'll make the visual adjust work beautifully.