miscoded

Dragonfly blog has details and download links. dev.opera.com has technical details and tutorials.

Now, this is an alpha release. Some issues you may have to overlook gracefully include:

• If you enable breaking on every script, the debugger will also break when Opera runs browser.js or user scripts - but no code will appear in the code pane! You will have to click "run" one or more times to get past your user scripts.
  
• It only responds every second time you press [F10]..
  
• Live CSS editing is missing..
  
• ..and so is HTTP logging and some other nice features that will arrive later.
  

That said, Dragonfly is already making itself useful in its present form. Have fun with it!