Transportation is what they were getting at. This typo can be found on the 'D,' or low probability section of the main page at http://faculty.quinnipiac.edu/libraries/tballard/typoscomplete.html
There are 21 of these showing in Worldcat this morning, but a high percentage of them are in the title - the worst kind of mistake. We find it interesting that every typo that we've seen involving inverted letters has the letters on opposite sides of the keyboard, so we are getting into issues with coordinating the two sides of the brain. As we hinted yesterday, this blog will soon be transported to a new location with a slightly new title "Typo of the day for librarians." This site will be left as an archive for the work that we've done for the past 200th of a century.