Bug 97523 [Import/Export] Get overwrite prompt before no resources selected prompt
3.1 RC1 - File > Export > Archive - clear any selected resources - enter an archive file name where the file already exists - Finish - it prompts to overwrite the file; choose Yes - it says "There are no resources currently selected for export" (OK) Should get the "no resources" prompt first, and not bother with the second one. Should check the other export wizards too.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardArchiveFileResourceExportPage1.java
int pathSepIndex = destinationText.lastIndexOf(File.separator);
                if (pathSepIndex != -1 && dotIndex < pathSepIndex) {
                    destinationText += idealSuffix;
                }
            } else {
                destinationText += idealSuffix;
            }
        }
        return destinationText;
    }
    /**
     *	Answer the suffix that files exported from this wizard should have.
     *	If this suffix is a file extension (which is typically the case)
     *	then it must include the leading period character.
     *
     */
    protected String getOutputSuffix() {
    	if(zipFormatButton.getSelection()) {
        	return ".zip"; 
    	} else if(compressContentsCheckbox.getSelection()) {
    		return ".tar.gz"; 
    	} else {
    		return ".tar"; 
    	}
    }
    /**
     *	Open an appropriate destination browser so that the user can specify a source
     *	to import from
     */