Cyrillic fonts at VM cart pop-up

Hi guys,
I'm using Cyrillic fonts on my site, and when I'm adding some products to the VM cart, at the pop-up window appears unreadable symbols instead of the product name (see picture). What could be the problem?
Joomla 2.5.9, VM 2.0.18a, latest version of Boutique

Please try this fix, it help other users and this problem is probably related with VirtueMart not our template http://forum.virtuemart.net/index.php?PHPSESSID=b1e6031cb4dfae5a235b3c89f178c67f&topic=111359.msg374103#msg374103

Please try this fix, it help other users and this problem is probably related with VirtueMart not our template http://forum.virtuemart.net/index.php?PHPSESSID=b1e6031cb4dfae5a235b3c89f178c67f&topic=111359.msg374103#msg374103

Thanks for the quick response bkrztuk, but with default template Beez20 everything is ok, problem only appears at the boutique template...

I figured out,
the problem was in: templates\gk_boutique\html\com_virtuemart\productdetails\ default.php at line 349. To fix this, code below should be replaced from:

<input type="hidden" class="pname" value="<?php echo htmlentities($this->product->product_name) ?>" />

to

<input type="hidden" class="pname" value="<?php echo htmlentities($this->product->product_name, ENT_QUOTES, 'utf-8') ?>" />

thanks for the tip bkrztuk

this fix, also resolve another problem of summing products in pop-up cart