When you edit a group you will see this message "The environment prevents the table from loading data." on IE9

Steps to reproduce:

1. Open a Wiki on IE9
2. Go to Administration
3. Click on "Groups" from Users&Groups section
4. Click to edit a group

If you add an user on a group, you are not able too view it in the livetable, because there you see this message: "The environment prevents the table from loading data."

Anyway, if you add an user, you will see it when you just click on the group name from the principal livetable (the livetable that you see when you click on Groups).