I've just installed Action Streams on a fresh MTOS 4.1 at http://wallrazer.com. When I navigate to Settings > Users > me > Action Stream (after adding a single profile) I get a TON of these errors (all for different services):
Software error: Can't locate object method "properties" via package "ActionStreams::Event::Auto::Goodreads::Toread" (perhaps you forgot to load "ActionStreams::Event::Auto::Goodreads::Toread"?) at /home/path/to/mt/plugins/ActionStreams/lib/ActionStreams/Event.pm line 164.
They also happen when publishing. I think I've installed everything as directed in the README.
--Steve

This seems to be an issue with the handling of events from Goodreads. As much as I love the site, it might mean that they've made an update or something that breaks talking to Action Streams. Would start by trying to remove the Goodreads account in your profile settings, and see if everything else still works. If that is the issue, then we can see if Goodreads has any more info on a fix.
However -- one potential gotcha that might mix you up is that on Goodreads, your account ID is a user ID, not your user login name. So if you haven't set a number like "12345" as your account ID in your MT profile for Action Streams, that could cause an error.
Thanks Anil, but as I mentioned on IRC, I'm not using Goodreads. I get these errors for every "Auto" class:
http://pastie.textmate.org/168923
I've since re-downloaded the plugin and re-installed it, and am still getting these errors.
Update: I realized that my local box (which has the same errors) and my server had one thing in common: and in-development version of my current plugin project:
http://redmonk.net/svn/plugins/Friends/trunk/
Disabling it fixed the errors. I don't yet have any idea why.
When I edit the action stream widget I get the following advisory above the template code:
One or more errors were found in this template.
And when I try to use the widget nothing seems to happen. I've checked everything is where its meant to be installed, and I can add profiels and see stream activity under my profile so I'm a little confused...
Am I meant to see the above errors?
I'm running into the exact same error message as Nick when cutting-and-pasting the default widget template. And while I've added profiles, I have yet to see stream activity under my profile.
There's a simpler widget template inline in the instructions, which does publish without errors, but doesn't seem to do much of anything (not surprising, I suppose, given the lack of activity in my user profile). Any ideas?
The author Action Streams widget example code is not correct. It's using old names for the tags. You can see jhh's explanation for the new names of the tags, or use the fixed version of the example. Sorry for the confusion.