severity 485079 serious thanks This breaks upgrades, therefore it's at least serious. on escher.debian.org: | Unpacking replacement libnspr4-0d ... | dpkg: error processing /var/cache/apt/archives/libnspr4-0d_4.7.1-2_alpha.deb (--unpack): | trying to overwrite `/usr/lib/libplc4.so', which is also in package libnspr4 Sincerely,