I would recommend running Software Updates. Also he might have duplicate fonts, you can check this by going to.
Applications/Font Book/
Then, highlight the Fonts with a DOT next to it and go to
Edit---->Resolve Duplicates
this should resolve the issue. you can also update Safari/download the latest version or use Disk Utility
/Applications/Utilities/Disk Utility
select the
Active Partition and click
"Repair Disk Permissions"
Good Luck!
__________________
- You can do anything you set your mind to man