Mac OS X 10.6.8 it was officially launched last night by Apple and some seem not to have updated, waiting for MuscleNerd to confirm that the new version of Mac OS X does not affect the possibility of jailbreaking. The confirmation came very shortly after the release of the new version of Mac OS X, Musclenerd confirming that it is still possible to jailbreak through DFU Mode using the limera1n exploit. In conclusion, you can quietly install Mac OS X 10.6.8 because it does not affect the possibility of jailbreaking and you need it anyway if you want to install OS X Lion.
