Hey, FliesLikeABrick here. LDAP logins on this site should now be fixed. E-mail me at firstname.lastname@example.org if you still have problems.
If you were already registered on here and happened to have the same username as your SF(LDAP) account, the accounts will remain separate. However, if you try logging in with your SF username to this site for the first time now, it will work and you’ll then have an account on here which uses your LDAP credentials.