I've been trying to update my Rockbox firmware using the Utility under Kubuntu. My device is a Sansa Clip+. I get as far as extracting the file, but then I get the message "Creating output file failed". I've gotten this to work in the past, but I don't know what's different. I'm trying to install the archived build r30258, but I have the same problem even if I try to install the stable build 3.9. I've successfully (I think) reinstalled the bootloader.
How can I get past this?