[algardo]

могу предложить вот такой костыль:

div[id^=post_message_] a:link { color: #0000ff; text-decoration: underline; }
div[id^=post_message_] a:visited { color: #0000cc; text-decoration: underline; }
div[id^=post_message_] a:hover { color: #af1d05; text-decoration: underline; }