Install add-on tool:
I tried to use plugins directory install button during approving a plugin. (wincache wasn't approved yet). This led to a 404 as moodle.org/plugins web service didn't serve download.moodle.org the plugin yet.

Error code: err_curl_http_code
$a contents: Array
(
[url] => https://download.moodle.org/api/1.2/pluginfo.php?format=json&plugin=cachestore_wincache%402013041800
[http_code] => 404
)

Can this error handling process be made a little friendlier so that it does a second attempt on moodle.org/plugins (only for 404's).

This second attempt/check however would need some (curl) session for accessing the file via a capability.

ps: This would help a lot with plugin approval process