Hi,
to solve the problem of the line breaks in tooltips, in viewweek.php you have to
add this at line 450:
$tipBody = $event->getStart()->format('h:i A') .' - '. $event->getDuration()->format('h:i A') . (trim($event->getDescription()) != '' ? '<br><br>' . $event->getDescription() : '');
$tipBody = str_replace("\r", '', $tipBody);
$tipBody = str_replace("\n", '<br>', $tipBody);
then replace line 453 with this
addTip('w_ev_div_' + <?php echo $event->getId() ?>, '<?php echo str_replace("'", "\\'", $event->getSubject()) ?>', '<?php echo $tipBody;?>');
do the same in viewdate.php when building tooltip (line 340)