How to use the NEW tumblr app? 2012-13?

I just made a new tumblr and downloaded the new app for iphone. I've changed my profile picture avatar thing on the web version but on my iphone app the picture is still the blue default avatar, does anyone know how to change this or does it take a while to update.
Thanks.
and my tumblr is dontyouseethe-starlightt.tumblr.com.

Just track here,
http://www.tumblr.com/tagged/2012-13