I've been releasing updates to the Pro version of Burp pretty frequently recently. Some of these are fairly minor so you won't always see alerts that a new version is available. To help people who do want to follow the latest updates, you can now subscribe to a listing of release notes.
The latest update gives Burp a new editor for raw HTTP messages, which can handle much larger messages efficiently, supports undo/redo of edits, decodes encoded content in mouse-over popups, and auto-colourises request parameters and response syntax. Here's a preview for people who don't yet have it:
As well as being prettier, it's much nicer to work with, and helps you spot interesting data more easily. It even works on Macs too, if you're into that kind of thing. Hope you enjoy.