Date: Jun 15, 2013 4:15 AM
Author: Themis Matsoukas
Subject: v9.0.1 lost the default settings

When I installed v9 I kept the default notebook style from v8. I updated to v9.0.1 and things were just fine until all of a sudden, mathematica reset all my preferences: now old and new notebooks open in the new v9 Default, and all of my customizations in the notebook window (rulers, etc) are gone. On a different computer things still work correctly. Can I move com.wolfram.Mathematica.plist.lockfile or some other file from  the "good" computer to the "bad" to restore my previous settings?

v.9.0.1 on Mac OS 10.8.4