Drag and drop to webview will freeze the desktop

I'm using Ubuntu 11.04 with latest updates, the webkit may have some problems.

The demo which works under Ubuntu 10.10 can't work under 11.04. Please try this command:

     curl -O https://github.com/tualatrix/tools/raw/master/examples/webkit/webkit-demo.py && python webkit-demo.py

When the window is opened, try to drag any file into the webview, it will freeze the desktop under 11.04.

I wrote another C demo, it behaved the same.