I have recently installed ISP3 and added roundcube functionality using the following link; http://howtoforge.com/forums/showpost.php?p=213239&postcount=20 I have noticed that all attachments - except for TXT files - are recognized as corrupt. I can not view any of those files. I have located a thread at Roundcube's own forum, about user with a similar problem. That specific user noticed an issue with the magic_mime configuration. Any suggestions?