An update on this issue:
About a year ago a German named John Brown claimed to have found evidence that a picture included in a picture of the displays at a 1906 aeronautical exhibit showed Gustave Whitehead in flight. The editor of Jane’s supported this claim. There was some discussion on this thread on the issue.
Some interesting research has come to light. The picture (within the picture) has now been I think conclusively shown to have been part of the John Montgomery exhibit, next to the Whitehead display, and that the picture in question is of a 1905 glider built by John Montgomery, and thus not a picture of Gustave Whitehead. This has long been the chief claim that there ever was a picture of real flight. The evidence now more conclusively than ever says that there was no picture, and was no flight.
This has resulted in interesting articles and statements put out by the Royal Aeronautical Society, Scientific American
http://www.scientificamerican.com/article/scientific-american-debunks-claim-gustave-whitehead-was-first-in-flight/, and others.
The photo in question is evaluated at
http://www.flyingmachines.org/gwinfo/challenges.html, a nice debunking of the Gustave Whitehead conspiracy theory can be found at
http://www.flyingmachines.org/gwinfo/index.html, and a list of unanswered questions about Whitehead can be seen at
http://www.flyingmachines.org/gwinfo/challenges.html.
It is interesting to see that news that the issue has been solved has not received much of the press that happened when the Jane’s claims were made a year ago. No word on when the Connecticut legislature will rescind the measure they passed that Whitehead was first.