This is a Firefox error. In Internet Explorer, you'll get the equivalent
[object Error] undefined.
You see this when you're in main page view, looking at Older Posts (or maybe Newer Posts).
The improved main page view, in Blogger Beta, rocks. Being able to page forward and backwards, and view all posts in the blog from main page view, is great. But here is a problem - you can see maybe 2 pages of main page view, before this pops up.
And it only applies to main page view. From article view, I used the Older Posts link, repeatedly, and viewed all the way back to the first post.
Are you here because you have this problem yourself? Have you reported it to Blogger Help? If you just answered "Yes" and "No", then you are part of the problem.
Here are other folks who have reported the problem, and who probably need to report it now to Blogger Help.
- Changing Number of Posts Breaks Additional Pages OPEN 9/23
- "Reference Error: Log is not defined" when trying to access archived posts OPEN 9/18
- Next Page Bug OPEN 9/16
- Older posts not show OPEN 9/16
And Ramani, of HackOSphere, mentions a friend who reported this, incidentally.
The error window, in Firefox
The error window, in Internet Explorer
Note that neither error window offers any interaction. Copy and Paste is not offered. I have to close this window to get my browser back. When I do, the main page view is blank. Only by reloading main page view, starting with the latest post, can I continue.
And yes, I did report this, and I replied to the botmail.
(Edit 9/27): This appears to be fixed, though again in silence.