We have been working on pubsubhub integration to reduce our back-end server 
load and increase sync speed as we synchronize multiple YouTube accounts on 
behalf of our users.

However, we're running into some difficulties:
- We attempted to subscribe to a video channel based on the feed of a 
users' most recent videos. The hub we are trying to subscribe to is the one 
at "https://pubsubhubbub.appspot.com"; with the feed structure being "
http://gdata.youtube.com/feeds/api/users/CHANNEL_NAME/uploads?v=2";.
- We have noticed that while using the publisher diagnostic provided at 
https://pubsubhubbub.appspot.com, that changes made to the YouTube upload 
feeds are not being pushed to the hub.
- We can manually publish a feed at https://pubsubhubbub.appspot.com/publish, 
but the feeds doesn't appear to auto self publish.
- While debugging, came upon this thread which seems to be identifying 
similar problems to the ones that we're facing:
http://groups.google.com/group/pubsubhubbub/browse_thread/thread/3898fe38c5e750ee?pli=1

Have others encountered similar difficulties?

Thanks,
Kieran (and team)

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