Padding with mcrypt_generic

I'm trying to use mcrypt_generic and it works fine except it pads the data with ^@'s when, according to the manual page, the length of the data is not n * blocksize. I've been trying to remove the padding from my decrypted data using something like "$string = str_replace("^@","",$string);", but it doesn't seem to work right (^@ is a single character, not just "^" . "@"). Has anyone had to do this before and found a solution? -- Ben Sinclair ben@yourwebwill.com