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
if ( inputImage.getURI( ) != null && selectedType == FILE_TYPE )
			{
				uri = inputImage.getURI( );
			};
		}
		if ( DesignChoiceConstants.IMAGE_REF_TYPE_EXPR.equals( inputImage.getSource( ) )
				&& selectedType == BLOB_TYPE )
		{
			if ( inputImage.getValueExpression( ) != null )
			{
				uri = inputImage.getValueExpression( );
			}
		}
		uriEditor.setText( uri );
		uriEditor.setFocus( );
		
		clearPreview( );
		if ( !uri.equals( "" ) && selectedType != BLOB_TYPE )
		{
			preview( DEUtil.RemoveQuote( uri ) );
		}
	}
	private void initList( )
	{
		for ( Iterator itor = getModuleHandle( ).getVisibleImages( ).iterator( ); itor.hasNext( ); )
		{
			EmbeddedImageHandle handle = (EmbeddedImageHandle) itor.next( );
			embeddedImageList.add( handle.getQualifiedName( ) );
		}
		int index = -1;