Helpful Error Messages

I've been using Facebook quite a bit recently now that more people my own age are on it :|

Anyway, one of Facebook's main features in my opinion is its developer platform, which in turn means third party applications. Unfortunately my experience of interacting with third party apps has been pretty poor mostly due to the following error message:

This type of error doesn't give me a huge amount of confidence in the robustness and scalability of the infrastructure. Web 2.0 at its finest...