Reported by Bidgee on IRC as a screenshot http://i638.photobucket.com/albums/uu105/Busabout/Error.png
The error is:
exception 'InvalidResponseException' with message 'Invalid response (404): Container has no Objects.' in /usr/local/apache/common-local/php-1.18/extensions/SwiftCloudFiles/php-cloudfiles-1.7.10/cloudfiles.php:1426.
The trace gives out:
swift.php(37): CF_Container->list_objects(0, NULL, '8/85/Union_Club...')
[internal function]: wmfPurgeBackendThumbCache( Object(LocalFile), false )
Version: unspecified
Severity: normal