I noticed that one of my sites which works fine in safari 3.2.1 release is broken in the latest webkit nightly and that's because of broken database support. I can open a database but if I call a transaction, no handler is executed. The same problem appears to me on the official webkit database example: http://webkit.org/misc/DatabaseExample.html The notes are not stored for me when running webkit nightly. They are when running safari standalone.
This could be related to the fact that messages from workers are not delivered to main thread when running ToT WebKit against Safari 3.2.1 on Windows. I don't know why that happens.