Your profile picture, or ‘avatar’, is automatically generated based on your email address. It is not intended to be an accurate representation, and any similarity to persons living or dead is entirely coincidental.
Please do not take offence.
In order to change your profile picture, go to your profile page (either by using the link near your picture or through the Members Directory), and choose ‘Change Avatar’. After you have uploaded and cropped the image, the new picture will be used next to your name throughout the site.