CNET

Re-installing from the OS X 10.1 Update Install CD: Converting OS X Update CD to a full install CD; 10.1.1 reinstall

Last week, we noted that the Mac OS X 10.1 Update CD cannot be used to reinstall Mac OS X 10.1 after you have installed Mac OS X 10.1.1. If you try, when the Installer gets to the point where you ...
CNET

Important new KB articles: Security Update prevents reinstall of OS X 10.1; more

We assume this means that when a 10.1.1 update (or whatever the next update will be called) comes out, you will not be able to install the update unless you have previously installed this Security ...
Ars Technica

Trying to erase a drive and reinstall OS X.

Recently my daughter purchased an early 2011 13" MacBook Pro. The seller reinstalled Snow Leopard with updates, and then upgraded it to Lion. Unfortuantely, some of his user info keeps popping up in ...