AJAX-Calendar Masks HTML-Tags in Tooltips after changing month

Seems like escaping too much. But just a quick guess for now. Could be a bug

A bug where? I think inside of the template.
Did you ask the devs of the template too? Because it's there the problem.

Forgot that it works with the other templates. Then I think it could be a conflict between mootools and jquery

Thanks for the hint. I now contacted the Themler-Team. I hope that the Problem is caused by the template and can be solved. I let you know as soon I have more information.

I think that I can exclude JQuery as source of the Problem. I edited the Template index.php and removed all JQuerry JS-Files. After some testing, the error still exists.
But can the Template modify the GET-Answer?