lucy24 - 8:29 pm on Sep 13, 2012 (gmt 0)
They changed it a while ago such that if there are no errors, that particular error type doesn't show up.
On the dashboard? I get "0 errors" and some green checkboxes on days when g### hasn't been able to invent a garbage URL to get a 404. (I went over and checked right now.) This happens often enough that they don't have to make up a robots.txt problem in order to have an error to report-- but thanks for the warning!
Or on the Crawl Errors page? There I just get the green checkboxes with a nice big white space underneath.