Six months after the Google News RSS feed validation issues were reported in Google News Help forums, Google has fixed the issue.
The first report came in a Google News Help thread on August 7, 2009. Yesterday, on February 8, 2010, Inbal from Google, said the issue was resolved. Inbal said:
This issue should be fixed. If you're still seeing issues, please send us the exact steps you're taking as well as the OS/Browser you're using. Finally, if you could either send a screenshot via a link or via the Report an Issue contact form, that should help us look into this further.
I am not sure why it took over 6 months to fix, but now it is resolved.
Forum discussion at Google News Help.