Flattr buttons dont show Clickcount

Hi,

my flattr plugin stopped working since last update.

my blogs url is: xn--netzgesprche-ocb.de

for example this post has X clicks on flattr itself:
http://www.xn--netzgesprche-ocb.de/index.php/2012/05/ng037-podception/

Flattr button correctly links to my thing on flattr:
https://flattr.com/thing/0940d6cd62113f61435405200ab7ade8/NG037-Podception

On flattr itself, there are 4 Clicks on the item – in the wordpress installation it shows 0.

I dont know, where i can start solving the problem.

Thanks,
Witzman

http://wordpress.org/extend/plugins/flattr/