I run a travel related content site and have been also hit by the changes made during the last week of March.
I've been following the threads and haven't seen anything that is reason for the drop in traffic to my site, though I've looked at all the suggestions from other threads.
301's etc all working fine
Dup content - Possible problem as I have a forum and googlebot spidered a bunch of irrelevant pages which might be seen as dup content. Since been removed using the Remove URL tool.
What's particularly interesting is that while Google's b-slapped me, Yahoo and MSN have each nearly doubled in traffic (though still not nearly close to the traffic from Google). I'm totally white hat and the site only has maybe 10 pages with travel related affiliate links.
Google still shows 10,000 pages indexed as well. I haven't changed anything on the site so I'm not sure where the problem could be.
Any suggestions? I never realized traffic had dropped so much, but a 95% drop in traffic doesn't just happen. I've already emailed google and asked them if somehow there's been a penalty applied to the site.
Thanks for any tips guys -