tedster - 3:51 am on Mar 16, 2013 (gmt 0)
Just a picky little language point here about the difference between crawling and indexing. They are indeed to separate steps and handled by different programs/software at Google.
Googlebot does the crawling and collects the data from the URLS - then indexing is done by another program that examines the collected data. You would only need to look at your server logs to see if googlebot has crawled the problem URLs since you changed the meta tag. It can take several re-crawls after a change before the URL shows up the index again.