What version of GWT are you using? 1.3.3? 1.4.60? Other?
1.5.3

What version of the gwt-dnd jar file or library file are you using?
2.5.6

What operating system(s) are you using? Windows? Linux? Mac?
Windows XP SP3

Does the issue occur in web mode, hosted mode, both or don't know?
Both

What browser(s) do you use? Firefox, IE, Safari, other?
IE 6/7

What is the browser version (if you know) from Help->About?
Help does not work because I am not on the internet. But the version is 
not relevant.

What steps will reproduce the problem? Please attach sample code if you 
can.
1. Take example 5
2. Before showing the example do a RootPanel.get().clear() 
3. Install the example on the RootPanel.

What is the expected output? What do you see instead?
Drag and drop hangs when you try to drag one of the widgets.

Do you have a workaround?
If you do not call RootPanel.get().clear() then everything works fine.
Unfortunately, we have a big application and the switching between pages 
is sometimes done using get().clear() and then add().

Please provide any additional information below.