Vadim - 5:20 am on Jun 8, 2006 (gmt 0)

my traffic has dropped around 80%

How it could be if 301 redirection is in place?

Have you removed your old site?

I moved with 301 without significant problems a couple of years ago.

However I kept the old site in place several months until the sites that linked to me changed their links to the new location. I naturally politely asked them to do so. I believe also that for Google it takes several months to completely re-index Internet and during this time it is better to preserve the old site.

If your domain is not new it may happened also that it has the bad history and bad inbound links.

Vadim.