Major problem with H4 tags not wrapping in IE6

[paulj]

Hi there I've recently built this page. http://www.petsgetslim.co.uk/mypets/browse_pets/?page=2 My problem lies when a particularly long name is inserted into the H4 where the pets name is inserted. I've tried adding overflow:hidden to the H4 tags, but that doesn't seem to have an effect.