I have transfered feed from Feedburner to feedproxy (Google). After that I have notice ouple of issuse with feed.
1. Total subscribers dropped down
2. Your Feed under the Optimize gives an error.
First problem is caused as email update was not sent to the email subcribers. So email subcribers are taken out of the total. So its link to the second problem.
But there is no clear soluton for the feed under the optimize in feedburner help group. At the movement I am trying to fix the second issue. Hopefully, first problem should solved.
Update: It was and internal error when I am tranfering from Feedburner to Google. It will take around 24 hours to see the results. You can always monitor the health of your feed by subscribing to FeedBulletin. You can find this in My feed page.
Links I have used so far...
14-MAY 2008: Our email delivery system did not poll some FeedBurner feeds for updates on 13-May; as a result emails were not delivered and email subscribers were not reported to FB subscriber totals for that date. We're investigating this issue.
UPDATE 12:00 CST: We restarted the polling process; starting now, any feed changes not yet delivered via email should be detected and delivered, albeit up to three days late, and from this point forward on your regularly scheduled window. We regret this error!
You may still see 0 email subscribers reported on your Analyze tab's Feed Stats view for Wednesday 5/14; this should be the last day with no reported email subscribers in this stretch. (Don't forget your subscribers didn't just up and disappear; they're still listed under Publicize > Email Subscriptions > Subscription Management.)