Peugeot website broken with Firefox?

[Yorvik]

The peugeot site works ok for me, but this one
http://www.jobcentreplus.gov.uk/JCP/index.html which works in Opera
fails with Firefox 1.5 (Dapper). When I click on 'Job Search Now!' it
asks me if a want to download ijb.aspx
I've not had chance to have a good look at this yet but an ideas.

It works with Firefox 1.5 and windows OK apparently.

Cheers

SteVe