a bit late i guess you managed to do it another way;
but if you look at the includes/class_form_login.php file you can see the namespace used is ap\lsw\login_form so you can simply change login_wid::curPageURL with login_form::curPageURL and that should work as intended.
or you can just use css so you don’t have to change it back for every single update there will be :
label[for=username], label[for=userpassword]
{
font-weight: bold;
}
http://www.paulooi.com/2006/01/24/word-press-20-trackback-fix-revisit/
at least i can receive trackbacks now, for sending it’s not quite yet ok but this one seems to work