Yesterday, it was discovered that IKEA's app, TaskRabbit had a security breach. The TaskRabbit site and app are currently down as they investigate the breach, so you can't change your TaskRabbit password as of now. However, this breach likely means that your TaskRabbit password was revealed to hackers. Therefore, if you used that same password on other sites, you should change those passwords immediately. For more information on TaskRabbit's security breach, see the BBC article below.