A TimThumb error has occured

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Could not find the internal image you specified.

Query String : src=http://rip.zitbrno.cz/wp-content/uploads/2011/08/zitbrno_sout%c4%9b%c5%be_logo_pro_kazdou_ulici.png&w=70&h=65&zc=1
TimThumb version : 2.8