New avatars are now showing up

Hi guys,

This morning i realized i got problem with avatars.

Using multisite and every user can upload and change their avatars until today.

Now they can change it, works like charm, but it won't change in comments, on my front page (where are all listed) and no where else.

However, i thought it was cache, and i waited for 3 hours for changes i've made, and still nothing.

Have no idea what's the problem..