random character displayed

[bangmalley]

Ever since I followed this guide (http://ubuntuforums.org/showthread.php?t=1130582) and installing chinese language support (SCIM), some character will be displayed randomly.
I copy and paste it somewhere, for example, I paste at the search box, it display correctly.

[bangmalley]

solved it by clearing font cache

$ cd /usr/share/fonts
$ find . -name fonts.cache-1|xargs rm -f
$ fc-cache .