[drupal-support] Comment Subject Settings

[Paul]

Hi all,
 I am using drupal on a multi-language site, which supports english and 
malayalam. The language malayalam is a multibyte language. So the 
default settings for limiting the length of a subject line is too short 
for languages other than english. My question is;
 How can I change the length of comment subject line?  Is it a good 
practice? What is the effect of this when i want to do an upgrade.

I am running drupal 4.5.1.

thanks,
Paul