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scotty - 10:15 am on Jun 5, 2002 (gmt 0)
From the manual, it is necessary to use this when the final URL needs to pass through Alias, ScriptAlias, Redirect, etc handlers.
Since it is a CGI, you need to use the "hack" passthrough flag in your rule. I.e.
RewriteRule ^dynamic/(.+).html /scripts/content.cgi?page=$1 [PT]