[xubuntu] files copied from data dvd are read only

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http://ubuntuforums.org – i use thunar, i tried the GUI way of changing permissions recursively, but that won't work, or only on a couple of files. i tried doing the command line way also, with same results. its the same with different dvd or cd discs. i have dropbox installed, but i may have had the problem before that. i use k3b, have tried both linux only format for disc, and windows friendly format, doesn't make a difference. any ideas as to why this is happening, and so stubbornly? surely it is not this way for everyone? (Hardware)