Property appearing on Map

Hi All,
I have just updated the responsive real estate from 5.6 to the latest 6.5

We have activated the map on the home page and as you hover over the property icons the property pop up looks really untidy with scroll bars and the description isn’t on screen. I can see the description in the code and I know this is a css problem but because it’s on the map I’m having trouble locating where to fix it.

Can anyone offer some help. Thanks in advance.
http://www.rybechomes.co.uk