Using "@" in placemark html description

I can not figure out, why can I not use @ in html description of the placemark. All other characters are OK, but when i use @ (for example in email address) my map disappears and some code text shows up.
Look here:
www.aeskulabx.cz/kontakt/mapa-laboratori-kontakt
EDIT: I could not wait, I had to move on with the web, so I changed the @ sign for a czech word (zavinac). But I hope it is only shorttime solution and you will help me.
Maybe you just comment if it is the same on your site, or is this bug just local at my site.
Could you please try it?

If i use ASCII code @ everything is OK, but this is not solution, I can not ask my client to use this method.
Please help.
Thanks

Search my forum - email cloak plugin produces new line break, which breaks my code

I disabled cloak plugin and it works!
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