Component doesn't work properly in FF last version (3.9) No text on hover, no mouse poiter change on hover for simple and Drop marker. Bouncing Marker looks fine. I've tried to step back to FF3.8 - hover effect working fine there.
This problem doesn't exist in Chrome, Opera and IE.
Can you put hover text on your demo site. This is one of the most impotant feature for user and I think it should be reflected on demo site.