Sorry, been without reliable computer usage for too long now. Aagh.
Here's the stuff:
1) contents of wp-content/uploads/.htaccess after upgrading to v1.08 (I think no changes from v1.05):
RewriteEngine On
RewriteCond %{HTTPS} off
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ http://tourkick-uploads-8624c237.s3.amazonaws.com/$1 [QSA,L]
RewriteCond %{HTTPS} on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ https://s3.amazonaws.com/tourkick-uploads-8624c237/$1 [QSA,L]
2) I visited tourkick.com / wp-admin / plugins.php?page=asssu-options. Then looked in wp-content/plugins/amazon-s3-uploads, in which there is no error file. However, there is a file 'wp-content/plugins/error_log', which contained this text (in addition to mentions of other unrelated errors):
[23-Jan-2012 13:54:03] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[23-Jan-2012 16:14:34] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[23-Jan-2012 17:33:07] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[23-Jan-2012 23:19:24] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 00:23:30] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 01:40:32] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 02:15:48] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 02:46:26] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 09:34:24] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 09:34:44] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 10:34:59] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 14:39:47] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 14:53:10] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 15:07:57] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 16:09:40] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 16:19:31] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 16:26:02] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 23:04:25] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 23:07:01] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 23:32:18] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[24-Jan-2012 23:45:01] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[25-Jan-2012 01:46:07] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[25-Jan-2012 03:09:08] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[25-Jan-2012 03:10:11] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[25-Jan-2012 03:12:54] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[25-Jan-2012 04:21:59] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[25-Jan-2012 04:24:32] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[25-Jan-2012 06:18:15] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[25-Jan-2012 06:59:30] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[25-Jan-2012 12:59:37] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[25-Jan-2012 16:13:51] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
[25-Jan-2012 16:53:43] WordPress database error Unknown column 'site_url' in 'field list' for query INSERT INTO asssu_endpoints (site_url, location) VALUES("tourkick.com", "s3.amazonaws.com") made by require_once, require_once, include_once, AsssuPlugin->__construct, AsssuPlugin->configure, AsssuPlugin->get_endpoint, W3_Db->query
3) I don't know what changed, exactly, but apparently everything's working now because http://tourkick.com/wp-content/uploads/2010/11/YouTube-Speed-Mbps.png goes to http://tourkick-uploads-8624c237.s3.amazonaws.com/2010/11/YouTube-Speed-Mbps.png, and https://tourkick.com/wp-content/uploads/2010/11/YouTube-Speed-Mbps.png goes to https://s3.amazonaws.com/tourkick-uploads-8624c237/2010/11/YouTube-Speed-Mbps.png, as desired.
Does this info help?