I.E . FTP Username History

I regularly use CCleaner as one of 2 cleaners to do all my trace removal. Found out today that the FTP user name history is not being removed. Don't know if this is just a missing feature or if it is a bug in the latest code or...

Steps taken to reproduce:

1) open a ftp site in M$ I.E. that requires credentials ftp://ftp.foo.bar

2) authenticate successfully with credentails

3) close I.E.

4) clean and wash everything - all options

5) rebooot, log off, or not - any which way same results

autocomplete does NOT fill in ftp://ftp.foo.bar, BUT the popup box asking for username and password does automatically fill in the last user sucessfully authenicated