Thanks for you reply. I have tried it without caching and without Timthiumb, but I still get the broken images. If I turn on cache and preload the images. The url image name retrieved from a search is different to the one in the cache.
Image actual name in cache=
Any idea why this would be?
It was working on my local copy with MAMP. I could try to clear all the settings on the plugin but how would be best to do this and can I save the styles I have created as it took ages to set up.