Hi Bosbaba,
I faced the same issue you described. Therefore I compared the source code of my website and of joomlabear.com and it turned out, that the used .swf files are different.
I used - according to the parameter settings - 'tagcloud_en.swf'. Here on this site 'tagcloud.swf' is used.
I've downloaded the 'tagcloud.swf' and removed the corresponding language parameter in 'helper.php' and it worked.
Please be aware that this is only a quick work-around which is not tested at all! I recommend to wait until there's an official fix for this issue, which I guess won't take too long.
Nevertheless I've zipped the two amended files. Usage on your own risk.