I think this is specific to Google Chrome 32+, as I perform the same operation fine in IE11. If I want to change the avatar on these forums, I select the new image and wait for image to upload. In Chrome, I don't get the notice "upload completed successfully" nor the avatar image is refreshed. When I click on Okay, nothing happens. However, if I close the window and refresh, the new avatar displays properly. Can anyone with a lower version of Chrome test this behavior in Windows?