Created a new account and uploaded a pic during the signup process. Once I got to the avatar section, the dashed cropping selection was somehow stuck in the upper left corner instead of the actual picture. Proceeded to drag marquee toward the picture, but it jumped right back upon release of the dragging. Pressed enter instead to make the selection disappear and got a funny cropped picture instead.
Next, I tried to edit my avatar by uploading a new pic (different file & filename), which gave me the nifty selection box on top of the picture — yes! Made the necessary adjustments to the marquee to make a specific selection on said new pic, pressed the crop and upload button and… nothing — no! Went through this process with varying steps twice and still to no avail. Cannot edit my avatar. Lovely.