Functionality wise, the Opera Mobile bundled with the HTC HD2 works as it should, but there are some tweaks which can make it take advantage of the high specs and beautiful screen of the Leo.

Smoother zooming and scrolling can be achieved by simply editing the registry and changing some values related to FPS (frames per second)

For both tweaks, you need to navigate to HKEY_LOCAL_MACHINESoftwareOperaInfo. Smoother zooming can be achieved by changing the value of ZoomFps from default 25 to 50 (I personally went for 30) while you can get smoother scrolling by changing the value of PanFps from the default 30 to 50. Don’t forget to Soft Reset in order for changes to take effect.

(Source: XDA Developers)