Use of unknown namespace: http://namespace.uri/

[Yuviter Pradeska]

what's wrong with my blog Feedburner? 

when i check in feed validator, I received a few messages like this: 

1. Use of unknown namespace: http://schemas.google.com/blogger/2008 

2. Unable to validate namespace: http://schemas.google.com/g/2005. See the Google Data specification at https://developers.google.com/gdata/docs/1.0/elements 

3. Avoid Namespace Prefix: atom10 

for this case I asked for his help to fellow bloggers of all, thank you....

rss feed blog address problematic  : http://ptr88.blogspot.com

[Grace N]

I am getting this same message.  I have also gone from 1260 subscribers down to 467.  Checking my subscriber list, it appears they are truly lost.  Wish I had saved the email list when it first started going wonky.  Too late now.  If you have not saved your email list of subscribers, I would do so now!