When you are generating a Trisul PDF report on CentOS / RHEL 6.x and you get funny looking charts as shown below, you might need to install Microsoft True Type fonts .
Download the Microsoft core fonts rpm package.
Run this as root
[root@localhost~]# wget http://www.my-guides.net/en/images/stories /fedora12/msttcore-fonts-2.0-3.noarch.rpm
Install rpm package.
[root@localhost~]# rpm -Uvh msttcore-fonts-2.0-3.noarch.rpm
yum install msttcore-fonts
Also check out the Trisul docs if you have other problems with PDF reports.