libdbd-sqlite2-perl has been replaced by libdbd-sqlite3-perl for normal apt-get use by Ubuntu. On tarball installation koha_perl_deps.pl -m gives the "2" version as "missing - not required" but after install <About><Perl modules> highlights DBD::SQLite2 in bright pink (even if DBD::SQLite3 is installed.) If DBD::SQLite3 is backwards compatible maybe file 'ubuntu.12.04.packages' should be updated. I believe that any functionality of this module is limited to "offline circulation" but am not in a position to verify.
*** This bug has been marked as a duplicate of bug 4269 ***