As well as Merge Cells not working at all, there is another bug.

1. Go to your demo, select any text
2. Click Insert Document
3. Select any file, set the Target to New Window
4. Add the link, then view the source

Here's an example of the HTML you're generating:

<a href="/guest/10n2.jpg" style="target:_blank">When</a

Should be:

<a href="/guest/87.194.212.121/10n2.jpg" target="_blank">When</a>

We need some pretty urgent fixes on these issues please.