trakkerguy - 6:25 pm on Feb 12, 2010 (gmt 0)

I've moved a 3 different sites over last five years. The 2 most recent (12 & 18 months) took a dip but recovered within 30 days.

Is it not possible that an algorythym change took place in the weeks after your site moved, or was hit with a penalty/filter, and that was the cause for delay in recovery?