tetex-bin: cannot create regular file

[Yang Shouxun <yangsx@fltrp.com>]

package: tetex-bin
version: 1.0.7+20021025-8

When I try to dvips a dvi file produced from latex code that contains Chinese 
character, dvips calls mktexpk (and ttf2pk) to create pk font files.  This 
used to work correctly. 

For some time this has become a problem. It reports
----8<----
mktexpk: Running ttf2pk -q gbsn18 1037
cp: cannot create regular file 
`/var/cache/fonts/pk/modeless/arphic/gbsn00lp/pk2497.tmp': Permission denied
kpathsea: Appending font creation commands to missfont.log.
----8<----

Although I use sudo to work around this problem, I suspect this is the cause 
for missing character in PS/PDF files produced by Mozilla or Konqueror via 
print to file, for there is no place for me to sudo.

I'm not sure whether this is a problem with the tetex package or a problem of 
configuration (I may have changed setuid bit of some programs, but I don't 
remember that's before reinstallation of the computer or not).

Thanks for any input!
shouxun