STUPID scroll boxes

i'm currently developing a phone book app using xml, php, and MySQL.

http://www.zionhill.co.uk/proof/phonebook/

Have a look...
Search for r (yup, just r).
You should my name and two of my work mates appear in the box below.
Click on my name (or whoever).
Note the details page, with INACTIVE scroll bar.

Now click on the close & do the same search.
Click on the same name.
note nor the scroll bar is ACTIVE...


ARRRRGGGHHHH!! This problem is driving me mad. Anyone else had similar problems with this component? Any ideas on how tro fix this annoying little problem?