Hi -

As you can see here : http://imgur.com/Pafp6.png
My thumbs randomly won't display, but as I can see in the source code, the picture exists.
What's wrong ?

Website : http://sabanasanta.lowfi.es

When I first looked, the thumbnail wasn't showing up for me either. Now it is working for me now though, so I don't know what was wrong.

Edit: Hmm, now it's not showing again.

Edit2: For the images that aren't showing up, the thumbnails are not being grabbed from the cache as they should. Have you tried purging your cache? It may also be that your server doesn't have enough memory to generate the thumbs/cache. If your images are very large you may run into such issues.

I checked, there are also some other image not showing. I downloaded a full image and it had 1600x1200px. I am sure it is most certain related to this (as mostly): http://www.zenphoto.org/2009/03/troubleshooting-zenphoto/#11

"In future versions of Zenphoto, ImageMagick may be an optional image processor, which may require less memory, and at least won’t share memory with Apache."

Does it mean that the only way to solve this problem at the moment is to resize my images ?

That's what it say. Or raise the php memory limit of your server.

Ok thank you.
Will try to release a theme soon