Over the weekend it was reported that some hackers attacked over iTunes and that was a general recommendation for users at the time to change their iTunes and Paypal passwords to protect against those attacks. Hackers used the users iTunes accounts for illegitimate purchases of some apps on Apple Store which charged users without knowingly.
Official Statement (courtesy: Engadget):
The developer Thuat Nguyen and his apps were removed from the App Store for violating the developer Program License Agreement, including fraudulent purchase patterns.
Developers do not receive any iTunes confidential customer data when an app is downloaded.
If your credit card or iTunes password is stolen and used on iTunes we recommend that you contact your financial institution and inquire about canceling the card and issuing a chargeback for any unauthorized transactions. We also recommend that you change your iTunes account password immediately. For more information on best practices for password security visit http://www.apple.com/support/itunes.
Well, looks like the store’s safe for now.