According to an article I read, avatars not changing on people's browsers is normal, and a forced update is what normally works.
I forgot the details about why this is, and can not vouch for it being true, but in any case, after reading the thread and seeing I had the old avatar on my screen, pressing F5 did change it for me in this case, on a pc with Firefox.
Oh, and congrats!
I noobly agree it sounds lovely.
best,
bert