Bug 183900 Image in preview pane will not show until you reopen the "Edit Image Item" dialogue [0001]
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ImageBuilder.java
dynamic.setSelection( true );
			switchTo( BLOB_TYPE );
			initURIEditor( );
		}
		else if ( DesignChoiceConstants.IMAGE_REF_TYPE_FILE.equals( inputImage.getSource( ) ) )
		{
			resource.setSelection( true );
			switchTo( FILE_TYPE );
			initURIEditor( );
		}
		else
		{
			uri.setSelection( true );
			switchTo( URI_TYPE );
			initURIEditor( );
		}
		return true;
	}
	private void initURIEditor( )
	{
		String uri = ""; 
		if ( DesignChoiceConstants.IMAGE_REF_TYPE_URL.equals( inputImage.getSource( ) ) )
		{
			if ( inputImage.getURI( ) != null && selectedType == URI_TYPE )
			{
				uri = inputImage.getURI( );
			}
		}
		else if ( DesignChoiceConstants.IMAGE_REF_TYPE_FILE.equals( inputImage.getSource( ) ) )
		{