In case you didn't know, Zynga and EA have been in a legal battle over copying each others' games.
Zynga has posted publicly an answer to EA's accusations as well as a demand for jury trial. Also posted was a counterclaim with redacted sections.
However, Zynga's legal team did a very poor job of redacting the documents. Instead of removing the redacted text, they simply set its background to black. The original redacted text can be revealed by highlighting the text.
It's very important that document redaction methods be properly reviewed by the IT staff prior to release. Without proper review of methods, sensitive information could be revealed, which could possibly cost an organization millions.
A Primer On Electronic Document Security