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bicycling - 4:53 am on Aug 22, 2006 (gmt 0)
The above mentioned means to disallow all bots from indexing your site.
Google has a robot.txt checker at [google.com...] you might want to try that.
And I think your first line is best advised removed.
User-agent: *
Disallow:
Unless you dont care about getting ranked in the SERPS you can leave that there :)