SharePoint 2010 Calendar hovers and add new button

When you hover over a day in the SharePoint calendar the “add new” link comes up. This isn’t working “exactly” right. The reason is, if you scroll down on the page and then hover over a calendar item, the “add new” link shows up in the wrong calendar day. It works perfectly fine if you don’t have to scroll down (the issue only happens when you scroll).

from

http://www.greggalipeau.com/2011/01/28/a-better-enhanced-sharepoint-2010-floating-ribbon/

http://underthehood.ironworks.com/2011/12/dealing-with-sharepoint-2010-calendars-add-button-issues-after-fixing-the-scrolling-bug.html