If you are accessing mail in '''icloud''' via '''firefox''' any attachment which ''contains spaces'' when saved will be corrupt. E.g "invoice for previous month.doc" when saved will come out as "invoice" with no file type and not the orginal size of the attachment. This problem is generic for all file types. Files that do not contain spaces or have _ in them download and save correctly. I have tested this using the latest versions of firefox also default settings. On both windows 7 and OS X lion. The problem still exists. I have had friends with other accounts test this and all with the same result. I have spoken to apple care who isolated the problem and requested that the issue be taken to firefox directly. The problem has been ongoing for a year or so. All other browsers have no issues with this problem. If you have any idea on how to fix this your input would be greatly valued.