#1 - Nov. 21, 2013, 6:57 p.m.
For example, if I access
http://us.battle.net/api/wow/character/Nesingwary/Kulakai
it returns
"thumbnail":"nesingwary/100/135565412-avatar.jpg"
But
http://us.battle.net/static-render/us/nesingwary/100/135565412-avatar.jpg
returns "Not Found"