why should we not use cd command in shell scripts

hi all,
i heard that, we should not use 'cd' command in shell scripts because of some reason. but no one could specifically say the reason, can anybody help me out with the reason for the same.

thanks in advance.
siva

I don't think the push is to not use cd, but instead to cd to a "safe" directory. Some exploits make use of the dir presently running, ergo if you cd to a safe dir such as /tmp, there's not much a nefarious individual can accomplish.
Of course, writing good code is a must as well.

There's also the issue of absolutes. Usually it's considered good form to write out your commands as absolutes, such as /usr/local/bin/myprog to start a particular program or place data. This makes it easier to follow, and does not rely on directory changes to perform. Less moving parts is always a "good thing".

Cheers.