form validation and md5/sha1

[eluser]timaksu[/eluser]
hey guys..for the password field i have this:

Code:

$rules['password']    = "trim|required|min_length[6]|matches[passconf]|sha1";

it technically does what its supposed to until i try to repopulate the form(say, when the passwords don't match). instead of repopulating it with the previously entered password, it uses the sha1'ed version of the password string instead.