I get this error trying to upgrade from 303 to 304 Get:1 ftp://ftp.scientificlinux.org 304/i386/apt-rpm/os rpmdb-SL 304-0.20050211 [26.6MB] Fetched 26.6MB in 6m39s (66.6kB/s) Failed to fetch ftp://ftp.scientificlinux.org//linux/scientific/304/i386/apt-rpm/RPMS.os/rpmdb-SL-304-0.20050211.i386.rpm Size mismatch E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? thanks in advace Alessandro