[Plugin: Postie] Error: could not write to temp file: ‘ ‘ and I can’t change ‘tmp’ folder to 777

Dear happy clappy people,

whenever i run the postie script after sending an email with a regular jpg attachment I get the following report:

Message Id is :
Email has following attachments:
text plain
image jpeg
primary= multipart, secondary = mixed
primary= text, secondary = plain
primary= image, secondary = jpeg
could not write to temp file: ”

All that shows up in my post is a missing image icon.
I have checked that my uploads folder is set to 777 and the tmp folder will only allow 755.

Any ideas?

Thanks, Balti