Google Groups are apparently being hacked en masse

Over the past few days, I've noticed that more and more peoples'
profiles are showing cross-posting of their legitimate messages to
various unsavoury forums. This doesn't appear to indicate that
accounts have been compromised (i.e. passwords hacked); it looks more
like someone has found a way to hack Google Groups to copy legitmate
posts to different groups, while making it appear that they came from
the original author. I'm now seeing this (extremely disconcerting)
activity on my own account See:

http://www.launch.is/blog/google-groups-hacked-posts-appear-in-porn-group-with-seo-key.html

http://groups.google.com/group/google-appengine/browse_thread/thread/fb06574b6ed8b726#

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.