• Clickable stack traces and file names if you've configured Xdebug's file_link_format setting
• Show the number of times each PHP error has been triggered
• Visual bugfixes when using Firefox
• Fix a bug which was preventing AJAX debugging from being output
• Fix a fatal error when using PHP 5.2 on Windows
• Display HTTP proxy information when appropriate
• Introduce the QM_DISABLE constant for unconditionally disabling Query Monitor
• Always return true from our PHP error handler to suppress unwanted PHP error output (eg. from Xdebug)
• Internals: Much more robust logic and even more separation of data collection and output
• Internals: Many performance improvements