I have followed the instructions on this page and have updated my Javascript template per this page but I see that the javascript template is different from the default templates listed here which I also tried.
I've replaced all of my comment templates with the ones listed on the above page.
But I'm still getting commenter_name undefined and mtUpdateSigninWidget not found.
I've searched both Javascript files, and neither have a mtUpdateSigninWidget function.
So has Movable Type become so complex that I need to be a programmer to work with it? If so, I'll have to give up now. The documentation seems incomplete, and it can be very confusing to figure out which version different documentation pages refer to.
Can anyone help? Can I pay for support from Movable Type?
Cindy
Reported on Movable Type 4.2

Hi Cindy. First, I apologize for the complexity of this and for your frustration. It should be easier! There's a few ways we can help out.
First, we do have professional support that can back you up with this kind of thing. If you look at the Blogger Support offering, you can purchase a support license and then file a help ticket to get answers directly from Six Apart.
But before you do that, there might be more resources to help. The Vanilla template set is a group of plugins that create very simple bare-minimum implementations of the community features, which you can copy & paste into your own site.
Let me know if that helps!
Thanks. I just got back to working on this, and walked through my steps. When updating the javascript again, I saw that there is a chunk of code at the beginning that is ignored...apparently it contains variables for legacy MT templates. When I removed the mt:Ignore tags, things started working.
Now I need to figure ot where those legacy templates are. I thought I had refreshed them all. I did try the vanilla template for comments, and that has helped.