Trying to upload any avatar (personal or group) I get these error messages:
Warning: stat() [function.stat]: stat failed for http://people.mediaworks.name/blog/wp-content/uploads/group-avatars/3 in /people/blog/wp-admin/includes/file.php on line 317
Warning: getimagesize(http://people.mediaworks.name/blog/wp-content/uploads/group-avatars/3/mw-logo.jpg) [function.getimagesize]: failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /people/blog/wp-content/plugins/buddypress/bp-core/bp-core-avatars.php on line 267
Warning: getimagesize(http://people.mediaworks.name/blog/wp-content/uploads/group-avatars/3/mw-logo.jpg) [function.getimagesize]: failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /people/blog/wp-content/plugins/buddypress/bp-core/bp-core-cssjs.php on line 81