1) I cannot verify that, all my tests are responding with a HTTP status 200.
2) Well of course I notices it with my IE9 first, but I thought that BrowserLab was a nicer way to show the results. Can you verify my findings with a IE-browser?
1) Seems / only has an internal error when authenticated. Otherwise it works fine.
2) I don't have an IE browser handy but BrowserLab started working fine with all the non IE browsers so it Looks like the site is having issues with IE.
I expect it is just a temporary issue though as there have been a number of other bugs that Google has been working through with the launch.
I can actually see a good argument for the API remaining read-only so that Google+ emphasises original content and doesn't just end up as a ghost-town full of content syndicated in from elsewhere and sending people off to another site to join in the real conversation.
I think their own developer console is being rate limited by the API call limitations or something. I can get my own data out of their APIs after signing up for my own API key and using it. The API is really limited right now though... there's very little you can do with it.
Check the BrowserLab results: http://i.imgur.com/S6dQP.png
I would say that there are two options:
* They don't test their site in IE9 (nor 8/7/6) or they don't know/care.
* They are actively doing this..
And I cannot believe the first..