Maemo Flasher-3.5 tool does not support any 64-bit operating systems. If Flasher-3.5 is not supported on your operating system you can try to install Maemo SDK Virtual Image from Maemo Development Environment Downloads page and flash Maemo device from Virtual Image (which includes Ubuntu). This may or may not work for you depending on how well virtualization technology you use supports USB on your HW. http://tablets-dev.nokia.com/maemo-d...-downloads.php
Linux rb-lt-new 2.6.31-21-generic #59-Ubuntu SMP Wed Mar 24 07:28:27 UTC 2010 x86_64 GNU/Linux