==========
TO UPGRADE BUGZILA DO AS FOLLOWS
==============
bash$ cd /var/www/html
bash$ wget http://ftp.mozilla.org/pub/mozilla.org/webtools/bugzilla-2.22.1.tar.gz
(Output omitted)
bash$ tar xzvf bugzilla-2.22.1.tar.gz
bugzilla-2.22.1/
bugzilla-2.22.1/.cvsignore
(Output truncated)
bash$ cd bugzilla-2.22.1
bash$ cp ../bugzilla-3.0/localconfig* .
bash$ cp -r ../bugzilla/data .
bash$ cd ..
bash$ mv bugzilla bugzilla.old
bash$ mv bugzilla-2.22.1 bugzilla
==============
If u r getting any database error after entring admin email
then delete time_wait in my.cnf then try it
====================
