After selecting the image file via "Browse", the button "Upload" must necessarily be pressed in order for the avatar to be activated; the image is restricted to a maximum of 80x80 pixels and 80 kB. If too large an image is uploaded, it can happen that the original image is not overwritten when one tries to replace it, which appears as a bug in the system. In such cases, the image can be sent by email to the administrator, who then embeds it manually.