I haven't changed anything to the best of my knowledge but I have been receiving these warnings through cron everytime systats.pl runs:

WARNING main::getServerStatus(mysql.pl 48) : Can not connect to root@localhost (Access denied for user 'root'@'localhost' (using password: NO))
WARNING (eval)(firewall.pl 238) : detect rule change : old rule INPUT / new rule INPUT(ACCEPT)
WARNING (eval)(firewall.pl 238) : detect rule change : old rule FORWARD / new rule FORWARD(ACCEPT)
WARNING (eval)(firewall.pl 238) : detect rule change : old rule OUTPUT / new rule OUTPUT(ACCEPT)

Now the mysql can't connect issue i have no clue about as the mysql module can connect without any problem and the /etc/webmin/mysql/config file has the password correct.

and quota/email.pl is sending this issue through cron:

reiserfstune: Reiserfstune is not allowed to be run on mounted filesystem.

I reinstalled the disk and netowork module but it didn't fix anything. I am using the latest webmin. I even tried doing an update with forcing the overwriting of files, but still nothing.