I’ve got the same problem after upgrading wordpress 2.8.4 to the latest version. First I made a backup of the MySQL database files, than I upload the new files manually by WS_FTP Pro, and finally I did a fresh installation.
I can upload every file, except *.rar files… In version 2.8.4 everything works fine. Now I get the same error when uploading *.rar files: error saving media attachment.
..if it works don’t fix it…
uffff nobody has a real answer!!!! I´ve been like this for a week searching in every forum and NOTHING can arrange this problem…. PLEASE HELP!!!
SOLVED!!
you need to have outside the file web (were yuo have all you wordpress) a tmp file with permiitions 777. and also everything I did on the post…. My answer go resolver at http://www.homocreativus.es this guys are really good at wordpress and online marketing. Hope this works for the rest.