I recently started a new project using Symfony 1.4 and ran into a problem where the modules generated by the admin generator didn't have any style or pictures. These assets are in the web directory of the sfDoctrinePlugin (or sfPropelPlugin if you still use that) but Symfony can't find them there automatically. To make this work you need a symbolic link inside your web directory. Luckily Symfony has a task for this so you don't have to create it by hand.
Here is how we create the needed symbolic link:
./symfony plugin:publish-assets