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ciml - 1:57 pm on Jun 8, 2002 (gmt 0)
It isn't very common, but I have been seeing it quite a lot over the last few months. I don't know whether this is done by server admin's trying to be more secure or if it's the default for some kind of Apache set-up. The solution is easy, just upload a blank /robots.txt as DrOliver suggests.
willtell, the 403 problem happens when the server default is set to use 403 forbidden for filed that are not found, instead of 404 not found.