lucy24 - 10:48 pm on Apr 12, 2012 (gmt 0)
when the bot gets redirected
But bots don't "get redirected" like humans. They can choose not to follow the redirect. Back when gwt listed the names of pages that were blocked by robots.txt, I always had a fistful of titles that it only knew about through redirects from non-blocked (because non-existent) pages.
That's assuming you give the googlebot 24 hours or so to assimilate a new robots.txt before putting any redirects in place.