Note: It was tough deciding whether this belonged here or ServerFault, but it seemed like a programming problem, so if it’s out of place, feel free to migrate it.
I downloaded the sandbox of Symfony 1.4.8 and copied the files to my webserver. Unfortunately, when I try to access /symfony/sf_sandbox/web/ (where I installed it), I get the following:

It seems like the images aren’t showing. According to the text:
If you see no image in this page, you may need to configure your web server so that it gains access to the
symfony_data/web/sf/directory.
However, when I try to locate the folder referenced above, it does not exist:
sf_sandbox
web
css/
images/
js/
uploads/
frontend_dev.php
index.php
robots.txt
As you can see, there is no sf/ directory under web/. What am I doing wrong?
Note: I am installing this on Ubuntu 10.04 64-bit using Apache.
All the images are located in the Symfony source directory.
I would try creating a symbolic link in the web folder called sf pointed to the following:
lib\vendor\symfony\data\web\sf
It should have access to the needed images at that point.