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
.isEmpty( ) );
			inputButton.addSelectionListener( new SelectionAdapter( ) {
				public void widgetSelected( SelectionEvent event )
				{
					openBidingDialog( );
				}
			} );
		}
	}
	protected void openResourceBrowser( )
	{
		ResourceSelectionValidator validator = new ResourceSelectionValidator( IMAGE_TYPES );
		ResourceFileFolderSelectionDialog dialog = new ResourceFileFolderSelectionDialog( true,
				true,
				IMAGE_FILEFILTERS );
		dialog.setTitle( Messages.getString( "ImageBuilder.BrowserResourceDialog.Title" ) ); 
		dialog.setMessage( Messages.getString( "ImageBuilder.BrowserResourceDialog.Message" ) ); 
		dialog.setValidator( validator );
		
		if ( dialog.open( ) == Window.OK )
		{
			uriEditor.setText( "\"" + dialog.getPath( ) + "\"" ); 
			preview( dialog.getPath( ) );
		}
	}
	private void preview( String uri )
	{
		try
		{
			Image image = ImageManager.getInstance( ).loadImage( uri );