cranfan - 10:06 am on Dec 9, 2011 (gmt 0)

Thanks penders.

I have a background image behind it so I can't really go that route.

However, it has since been pointed out to me that if you change the border-bottom-style to "dotted" it works ok.

It seems to work still in the other browsers. So, at the moment I have not come across any drawbacks.