If you click on each month, and combine Mac OS with MacIntel, you get the following:

Sep 05: 3.74%
Oct 05: 3.87%
Nov 05: 4.11%
Dec 05: 4.35%
Jan 06: 4.21%
Feb 06: 4.30% (4.28 + 0.03)
Mar 06: 4.37% (4.29 + 0.08)
Apr 06: 4.49% (4.33 + 0.16)
May 06: 4.42% (4.19 + 0.23)
Jun 06: 4.32% (3.92 + 0.36)
Jul 06: 4.29% (3.80 + 0.49)
Aug 06: 4.33% (3.71 + 0.62)

The reported 0.02 decline by the Inquirer is the difference of Dec 05 (4.35) vs Aug 05 (4.33). I'm not sure why Dec 05 was chosen as the comparison month vs. Sep 05 (which paints a rosier picture) or Apr 06 (which paints a bleaker picture) but there you have it.

120 HZ (60 HZ / eye) is needed to get 3D with a decent refresh rate per eye. Slower than this and you can notice a flicker in the display too easily.