Virtualmin quata error

We are receiving following error while listing virtual servers in virtualmin panel.

HTTP/1.0 500 Perl execution failed Server: MiniServ/1.585 Date: Wed, 30 May 2012 13:07:25 GMT Content-type: text/html; Charset=iso-8859-1 Connection: close
Error - Perl execution failed
Illegal division by zero at /usr/libexec/webmin/virtual-server-theme/right.cgi line 1094.

Please find the other details.

/dev/sda2 on / type ext4 (rw,grpquota,usrquota)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw,rootcontext=“system_u:object_r:tmpfs_t:s0”)
/dev/sda1 on /boot type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
/dev/volume_group1/lgical_volume1 on /home/backup type ext4 (grpquota,usrquota)

( /home/backup is the root directory )
Please suggest a fix for this.