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I'm a little late to the party, but I want to summarize what I see as the answer. 1. The "Search Engine Blocked by Robots.txt" is only a warning, and not an error. If you intend for these pages not to get crawled (and it does seem like you have a good reason for this), then there is nothing to worry about. 2. The reason the warning appears for MSNbot and not Google is that currently, your robots.txt allows Google to crawl those files. As Daniel pointed out, you would need to add the identical directives to your robots.txt file to make this happen. Does that make sense? Or you could just add all of these files under the * directive to apply to all robots.