I'm affected by the problems with Intel wlan cards (yes, I know I should connect NAS to the ethernet cable but need to use my NAS over wlan ) - https://bugs.launchpad.net/ubuntu/+source/linux/+bug/944271 - which exists even in the 3.2 kernel available in backports for Squeeze. How to upgrade to the most recent kernel (like 3.9.x or 3.10.x)? Is e.g. this guide safe:
BTW, any estimation when we may expect OMV release based on wheeze? Newer kernels are available in wheeze backports.