--oops. that should hopefully be an easy fix.

ctrl+f to find a:visited where it reads
a, a:visited, a:active, .ljuser, a:hover{ color: #000; font-weight:normal!important; text-decoration:none!important;
}

remove a:visited from that line-up and make a new entry under that group of code
a:visited { color: inherit }

i don't have this issue on my end (which is why i didn't catch it) so i can't promise it'll work :X