The graph at the bottom left corner of this page :
http://dog.dnr.alaska.gov/is an example of this problem.
Tooltips on hover display fine except when Internet Explorer is in
Compatibility mode. This site is not in the list of Microsoft's
compatibility view list :
http://ie9cvlist.ie.microsoft.com/ie9CompatViewList.xmland when I manually set it to view in compatibility mode, the font
becomes unreadable(elephant?), otherwise in all other browsers it
shows up as what I set it to - Arial. This only happens when the page
is viewed in Compatibility mode in IE9.