As whoever hasn't got one often ends up with mine, if you so wish this is how to make your own:
Click on the Oberin log in icon. Log in and select settings
Scroll down the settings screen and you reach the avatar part - you can either choose a file from yoru computer (bear in mind dimensions etc) or choose one that the site offers:
Please note that I uploaded my avatar and Rosina's ages ago, in the old forum and have not tried on the revamped forum so, if it does not work, I am afraid you will have to consult the expert...