I have had some people say they cant upload photos, when i check the img files at my hosting i see they have been uplaoded, they are within file size but are not showing on the ads or even in the admin panel.

Is it an issue with the actual pixel size of the uploaded photo and can i change this, if so wher is it located?

Also in the uploadify settings there is 'Uploadify crop interface' what does this do exactly as i have it as disabled

thanks
Chris