Steps to reproduce:

1. Go to http://cutesoft.net/example/general.aspx
2. Click the "New Document" button (it looks like a white sheet of paper, it's located between the "Save" and the "Print" buttons). Notice that your cursor seems to disapear.
3. Click the  "Insert Template" button, select a random template and click "Insert"

When you click the insert button, you will notice that nothing happens: the "Insert Template" window is not dismissed and the HTML is not inserted into the editor as expected.

This can be reproduced with Chrome only. IE and Safari seem to be fine. I did not test FireFox.