In 2009, 2011, and now 2012, the sole credit card I used was compromised with an inappropriate charge as shown on my credit card's transactions web site. This time a subscription charge of $19.95 from Experian (for credit reports yada) had been billed to my credit card. That the problem may involve Experian seems ironic.
In each of these instances since 2009, my credit card company and I agreed to cancel the credit card and have a new one issued. The credit card company (which is also my bank) credited back to me without argument the amounts of the disputed transactions. The merchants were also more-than-cooperative.
My credit card company said the best means of prevention, in today's high tech world of wireless scanners and similar, remains to check credit card transactions regularly.
I put in my financial notes the steps I need to take each time I have to cancel my credit card due to an ID theft situation. I work in cash or with my debit card (which I otherwise never use) until the new credit card arrives.