Adobe, the maker of such products as Acrobat, Photoshop, Illustrator, and Dreamweaver has been hacked and 3 Million customer records have been compromised. These records include customer information, encrypted credit and debit card numbers including expiration date, email, and other data. The software maker is changing passwords on accounts that have been touched by the hackers and offering free credit card monitoring for these users as well.
Adobe does not think that the intruders have stolen and decrypted the credit card number but it is hard to be sure. If you have used your credit card on the Adobe website for a software purchase or a subscription to the Adobe Creative Cloud it would be a very good idea to keep an eye on your accounts for suspicious behavior.
If you have reused the same username / email and password for other websites it would be a good idea to change them now.
More information about the hack from Adobe: http://blogs.adobe.com/conversations/2013/10/important-customer-security-announcement.html
The Register: A-D’O!BE: Adobe THRASHED in ‘sophisticated’ MEGA HACK