I've been using 10.4.8 recently because the 10.4.10 mac.nub release was failing to load .dmg files. .8 works perfectly, but I'd like to update to a newer release. Is it possible to upgrade to .10 with the mac.nub disc or even .11 if I can find it? Or should I stick with .8 for now because it seems to be working great?

look for kalyway update combo if you want to update. Mac.nub have never work for me, i just used kalyway 10.4.10 install cd and it works