Logged In: YES

First try last stable (6.3 build 1.800)
If problem still occurs, this means your update failed, or
you have 2 differents files of awstats.pl on your disk, or
you have 2 different files browser.pm on your disk, or you
use a cache for perl (like in mod_perl) and you didn't reset
it (restart completely your web server after AWStats update).