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Version 4.3: Several fixes and enhancements.
Version 4.2: Fixed some small issue.
Version 4.1: Enhanced tree style. Multi-window switching support.
Live updated highlight for changed text. Screenshot: http://files.myopera.com/mbbill/files/undotree.png
Customizable key mappings.
Fixed some minor bugs.
Added saved status, relative timestamp and ability of clear undo history.
Version 3.0: Add diff panel. Performance improvement.
Version 2.2: Stable version.
Version 2.1: Fixed some annoying issues.
Added some new features: hotkey support. handle undo levels, auto refresh, and so on.
Version 1.0: Initial upload