Over the last 2-3 days, the 3.0.x branch has been synchronized with trunk. Specially database, amiga related and webdevelopment were merged to a high degree.
If you notice anything different after updating 3.0.x, don't hesitate to report it.
I hope it doesn't need extra mentioning that NOW would be an excellent time to test the 3.0 branch to see if your code behaves as you expect.