openmediavault 0.4.0.2

maybe I am asking a stupid question, but how to upgrade from 0.3.1 (Omnius) to 0.4.0.2 as that does not work as is described using the update manager?

Cant update to 0.4.0.2 from 0.4.0.1
#4000:
exception 'OMVException' with message 'Failed to execute command 'export LANG=C; sudo apt-get --show-upgraded --simulate dist-upgrade 2>&1': Reading package lists...
E: Encountered a section with no Package: header
E: Problem with MergeList /var/lib/apt/lists/ftp.ru.debian.org_debian_dists_squeeze_main_i18n_Translation-en
E: The package lists or status file could not be parsed or opened.' in /var/www/openmediavault/rpc/apt.inc:63
Stack trace:
#0 [internal function]: AptRpc->getUpgraded(Array)
#1 /usr/share/php/openmediavault/rpc.inc(265): call_user_func_array(Array, Array)
#2 /usr/share/php/openmediavault/rpc.inc(98): OMVRpc::exec('Apt', 'getUpgraded', Array)
#3 /var/www/openmediavault/rpc.php(44): OMVJsonRpcServer->handle()
#4 {main}

How to fix this ?

Thx, that's helped.