What knot do you use to tie your wind-on leader to the running line?

Do you use a different knot for mono or braid (running line).

Have you had a problem with braid weakening immediately adjacent to the knot?

Thank you in advance ...

Flounder

Flounder,
I am using a 15 turn albright knot for braid to leader. I haven't had any difficulty with the running line weakening at the knot.