I just finished upgrading my Jasjar to the latest 'cooked' version of WM6 -- specifically the CE Rom: (2.12.08 WWE) which has a new core version 5.2.1938.

What's changed from version 2.12.06 - 2.12.08 WWE
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• Added Transcriber support
• Added A2DP/ WiFi Connections.
• Corrected Phone/Screen resume issue.
• Corrected messaging button issue.
• Corrected Camera buffer issue.
• Improved System performance.
• Improved power management.
• Improved phone application response times.
• Improved system response time and stability.

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Flashed up ok with no errors or bad messages! So its back to re-installing my favorite applications.