Hi all,
the problem with apostrophe isn't fixed for the description text.
To fix it, read the following steps :
Note : Files are located at application/view/event/
1. open files "viewdate.php", "viewweek.php" and "calendar.php"
2. find the word "addTip"
3. just before the javascript (on the <?php ... ?> tag) apply the fix gived by Ignacio :
$tipBody = str_replace("'", "\\'", $tipBody);
EDIT :
note that on calendar.php, the variable $tipBody is named $tip_text
Regards.