Cannot modify header information

hi there
I got a problem, I install two addons: avator and smiles. when I use smiles in post or reply, the broswer display the error message below:
Cannot modify header information
the same thing happend when I use avator.
google result shows that I have to edit the php.ini and set the output_buffering ON or add ob_start() at the php script file.
the other way is instead head with echo script.
is there any other way to fit it?;-)

bill

Check this thread first:

Warning: Cannot modify header information - headers already sent by ... etc.

thanks paul.:D
This Really Helped.