Photographers seem to have discovered a flaw in the new Canon EOS 7D, which results in a shadow of the preceding frame showing up in the following image when the continuous shooting mode is chosen.
The flaw was confirmed by Canon in Japan and elsewhere. Canon announced that it "is currently investigating and analyzing the cause of this phenomenon, and we are planning to release a firmware update to address this issue."
Canon USA actually has this on its website:
In images captured by continuous shooting, and under certain conditions, barely noticeable traces of the immediately preceding frame may be visible. This phenomenon is not noticeable in an image with optimal exposure. The phenomenon may become more noticeable if a retouching process such as level compensation is applied to emphasize the image.
This just reaffirms the wisdom of never buying the first edition of any camera (or computer, for that matter). Waiting for the bugs to be discovered by the impulsive (or impatient) buyers always pays off for those of us who prefer to wait.
It should be said though, that as far as I've read so far, no one has been able to replicate this flaw in the cameras supplied for testing.
Update (November 5): Corrective Firmware from Canon is now here.