Please check out this page and roll over one of the days with a scheduled event and see the tool tip is really hard to read, the letters are to close to each. Its a plugin for Wordpress so just trying to see where in the CSS I can change it to fix it.
http://david-mitchell.ca/calendar/
Thanks,
Mike
Well this was tricky to find lol 
It’s this rule in one of your 10 stylesheets 
#tooltip h3, #tooltip div {
margin: 0;
[B]letter-spacing:100px;[/B]
font-size: 12px;
line-spacing:6px;
font-weight: normal;
color: #000;
}
Just add letter-spacing or a new font or w/e you want :). Letter spacing done there (huge value to demonstrate)
This is the stylseheet
http://david-mitchell.ca/wp-content/plugins/events-calendar/css/events-calendar.css