After a pair of spoiled SD Cards, I've started to investigate what's happening with the SD cards and the Raspberry PI. Overlocking? Too many reads and writes?? Bad batchs?? At the current point of my investigation (2013-08-24) it seems that nobody knows, or at least all these problems can cause a SD corruption.

I've started this page to collect all my investigations and further directions.

• April 2013: a well docummented case in raspberrypi.org.
• March 2013: a technique to avoid data corruption by making regular checks on the sd card

Test with a multimeter the power source I am using: is the best possible?? I've detected that many charges of mobile phones have notorious variances in their voltage. Is this the case?? If it is, I will use a regulated power source (those that keep the voltage regardless of the consumption).

Checkout the this thread and you will find a start guide who says the following:

The unit is powered via the microUSB connector (only the power pins are connected, so it will not transfer data over this connection). A standard modern phone charger with a microUSB connector will do, providing it can supply at least 700mA at +5Vdc . Check your power supply's ratings carefully. Suitable mains adaptors will be available from the RPi Shop and are recommended if you are unsure what to use.