Plurk CSS code to change the Vertical Bar you see on your Plurk timeline:
/* Timeline Vertical Bar */
#timeline_bg .day_start .div_inner
/* background: transparent; use this to remove the bar*/
opacity: 0.1; /* see through */
/* end Timeline Vertical Bar */
if you wish to remove the bar, uncomment the 'transparent' line and comment the #FFFFFF line. Just in case u want to bring it back.