Liberapay: Improper Data Validation / Unvalidated Input

Steps to reproduce: 1 - Be logged in a account 2 - Go to: https://liberapay.com/user/edit/statement 3 - Click on Visualize 4 - Submit and edit POST parameters to fuzz infinitely 5 - Wait the server proccess the request. I send only 2.813.054 characters. Improper input size validation... I'm sorry...