Hi,

attachment type
the newly introduced extension based mime-ing does not work, an old code fragment got back...:
https://svn.roundcube.net/trunk/roundcubemail/program/steps/mail/attachments.inc
instead of
'mimetype' => rc_mime_content_type($filepath, $_FILES['_attachments']['type'][$i])
should be this
'mimetype' => rc_mime_content_type($filepath, $_FILES['_attachments']['name'][$i], $_FILES['_attachments']['type'][$i])

undocumented plugin hook
http://trac.roundcube.net/wiki/Plugin_Hooks
$attachment = $RCMAIL->plugins->exec_hook('upload_attachment', $attachment);

Bye,
Balazs