Hmmm, I noticed here http://www.knoppix.net/wiki/Knoppix_Remastering_Howto#Setting_up_for_Remastering mention of a "bug in unionfs" in Knoppix 4.0.2 (it's in step 9 of the setup procedure). I don't know enough (actually I know nothing) about unionfs - this may or may not relate to some of the oddities being seen. Chris