Log on to an RDS server with IE 9.0 and the favourites are gone

Hi All,

We have most of our RDS Server running IE 8.0  butWhen a user logs on to an RDS  Server which has IE 9.0 installed the favourites are gone. The favourites are deleted. I can restore the favourites folder but it's almost a 1000 users that I'll have to do this for.

Any ideas as to what causes. any fixes

Cheers,

JP