netmeg - 3:40 pm on Mar 1, 2011 (gmt 0)
I have abnormally high bounce rate on the home page of one my sites. People come to that page for a specific reason (the date and time of a popular Detroit event) and I put it in a great big blue box on the top of the page, so they find out when it is and, if that's all they want to know, they leave. Been that way for years. Doesn't seem to have hurt in Google. So far.