Well, this issue is still open. I just completed version 3.0.10 of my Smartfeed extension and got a HTTP 504 error uploading it for extension review team review:
504 Gateway Time-out
The server didn't respond in time.
The archive is about 2.1MB in size and includes the SimplePie library, which is mainly why it's so big. It can be download
here if you want to give it a try.
I can't get a new version of this extension checked and approved until this issue is resolved.
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