I can confirm uga's report as I experienced the same issue...
E: /var/cache/apt/archives/cupsys_1.3.2-1ubuntu4_i386.deb: trying to overwrite `/usr/share/doc/libcupsys2/CREDITS.txt', which is also in package libcupsys2
I can confirm uga's report as I experienced the same issue...
E: /var/cache/ apt/archives/ cupsys_ 1.3.2-1ubuntu4_ i386.deb: trying to overwrite `/usr/share/ doc/libcupsys2/ CREDITS. txt', which is also in package libcupsys2