In avast! Home/Professional, version 4.1.304 of November 26, 2003 is expected a reduced overall memory footprint of avast modules (see iNews).
Could the users posts any trouble with the new version, disregarding the ones from the last versions? 
For me, everything is right.
Vlk, could you confirm the new aswMon2.sys file was included in the version 4.1.304 ? 