Recently I had a few problems with a few sites I just start to handle (all on same IP):
Recently they got de-indexed by MSN, for a reason that remains wierd to me. Even more a few other sites that linked to these ones (located on different IPs) received a penalty (drop in SERPS).
Do you have any idea why this happend - as far as I know the sites are legitim and no black hat seo is used.
Please let me know if you notice anything that may result in this MSN ban / penalty.
Thank you in advance.