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There is no need to bother with tricking a Mac already running 10.7.2 BETA3 into 10.7.1.

First of all the reversioner doesn't do the trick on many systems, both my MacBook Pro 17" 2011 model and my MacBook Air 13" 2011 model got corrupted after running the reversioner for the latest 10.7.2 BETA release followed by running Software Update with 10.7.1.

So if your already on 10.7.2 and want 10.7.1 you should roll back to 10.7.0 first by doing a recovery from a TimeMachine backup or simply re-install Mac OS X Lion from scratch.


Secondly it seems like the latest (11C37 aka BETA3) version of 10.7.2 released a few days ago contains most, if not all these 10.7.1 fixes anyway. For instance my Finder version reports to be 10.7.1 while running 11C37 (BETA3) compared to 10.7.0 with 11C35 (BETA2).
 
Put simply, the latest version of 10.7.2 contains all of the bugfixes of 10.7.1 plus some additional things. You'd be losing rather than gaining things. You are downgrading, after all.

Unless you've experienced any problems on the developer preview of 10.7.2, I strongly suggest you avoid downgrading. Odds are, you may experience completely new issues if you try this since some upgraded bits from 10.7.2 will inevitably remain unless you do a fresh reinstall.
 
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