Niki at Trulia here. I am sorry you are having trouble viewing the pictures.
It is difficult to say what is happening without more details. For example is this the only property that the pictures are not loading for? What operating system are you using? What is your browser?
Usually when the issue is isolated to a specific user it is a compatibility issue between the site and the browser. Trulia no longer supports Internet Explorer 7. You may update your browser or try another browser if this issue continues. You may also want to check the security settings and filters on your system to make sure there is nothing blocking the data.
Please feel free to contact us directly to trouble shoot further at email@example.com or by calling 1-888-466-3501, Monday - Friday 7am to 4pm PST.