tedster - 5:33 am on May 5, 2010 (gmt 0)
However, googlebot does accept the Allow directive as an extension to standard robots.txt syntax. In fact, they even suggest this syntax in their Webmaster Help and they use it in their own robots.txt file.
I don't understand the first directive however - the one with the period. As an Allow directive, it adds nothing and it "might" be a problem. Do you have URLs that look like example.com/.filename ?
Webmaster Tools will tell you if they wanted to crawl some file that was restricted by robots.txt