Gem Errors

I was getting some errors like this:

Invalid gemspec in [/Library/Ruby/Gems/1.8/specifications/authlogic-3.1.0.gemspec]: invalid date format in specification: “2011-10-19 00:00:00.000000000Z”

I found this perl command on stack overflow:

perl -p -i -e ‘s/ 00:00:00.000000000Z//’ /Library/Ruby/Gems/1.8/specifications/*.gemspec