Samsung M5S: Compatibility Issue in MacBooks?

According to reports submitted to Xlr8yourmac, readers indicate to have compatibility issue with 2.5" HD Samsung Spinpoint M5S 250GB. While the drive works perfectly fine when installed in an external FireWire enclosure, it is not recognized once in the first generation of MacBook or MacBook Pro.
If the problem is not fully understood, as it might involve firmware or even original NAPA motherboard, we decided to publish a quick warning in case you decided to buy this HD for your MacBook over the week-end.