Before checking the bug tracker (and realizing that bug "Classic View no longer functioning - ID: 3088483" was happening for all users and not just me), I attempted to send an email to the email address at the top of Slashdot comments pages asking for feedback on the commenting system. This address is "firstname.lastname@example.org".
The response I got starts as follows:
We're writing to let you know that the group you tried to contact (product) may not exist, or you may not have permission to post messages to the group. A few more details on why you weren't able to post:
* You might have spelled or formatted the group name incorrectly.
* The owner of the group may have removed this group.
* You may need to join the group before receiving permission to post.
* This group may not be open to posting.
If you have questions related to this or any other Google Group, visit the Help Center at http://www.google.com/support/a/geek.net/bin/static.py?hl=en_US&page=groups.cs.