creative_craig - 12:06 pm on Sep 28, 2010 (gmt 0)

Anything is possible but I still dont think this is what happened in this instance - its just the natural rise and fall of rankings.

You can check a few things;

Do you know if Google visited your site since you have removed the Like button? Maybe check your logfiles to see if Google Bot has been by
You can also check the cache to see if it has been updated to give an indication that Google has been by in the last 24/48 hrs