I'm a little late to the party, but I've been using K3b for burning isos since PCLOS v.93. I've been running LXDE for over a year & using K3b successfully. But starting around last Oct or Nov, K3b crashes when trying to burn images. No big deal, I just switched to xfburn for my disc burning jobs. Anyway, thought I'd throw this in as I saw the topic here in the forums.
Paul