>1. If the new subscription panel is for subscribers only, it would be more logical to put the enable/disable checkbox and the width field in the Subscriber setup section, not the general user setup section. It took me quite a while to find it there.

Non subscribers should have the ability to turn it off. That's why it is in the general "Update your account" page.

>2. When the subscription panel is enabled, the message panel is too wide and shows a horizontal scroll bar. Could you please make it so that if the subscription panel is enabled, the messsage window width is automatically reduced by the width of the subscription panel?

This is caused by the toolbar. I need to split that on two rows.

>3. When enabling/disabling the subscription panel, the change doesn't take effect without (it seems) logging on to UT again. For example, Time Warp doesn't show the change.

Yes, this is normal.