Dropped off listing for no reason

[jrh10]

I hope someone can help, i am web designer and have ran the site www.crb.gb.com for a client for over 5 years.

In that time the site has always been well listed in Google, searches for "custom peptides" and the company name "cambridge research biochemicals" always brought the site up near the top of the listings.

The client has used adwords for around a year to increase coverage for specific words and recently also started using overture for other search engines.

Over the last month however the site has dropped dramtically off google - searching for the company name or specific phrases just don't bring up the site - in fact the only way to get the site to display is to actually search for the web address (crg.gb.com).

What could be causing this problem - when i search for site:crb.gb.com i can see google has over 50 pages from the site indexed and all within the last two weeks.

What can be causing this problem - the site has a page rank of 5 which it has had for a long time.

Any ideas would be very much appreciated.

Thanks
Jon

[ByteTraveler]

If it's any consolation, I've had exactly the same thing happen with three sites over the past few weeks.... None of them funky in any way, and one, a MAJOR not-for-profit medical professionals association.

What's really wierd about that one is not only that it "vanished" (after ranking #1 for more than a year when searching for the association name), but Google now only returns some old cached pages that vanished off the site more than two years ago, and which weren't there when things were correct several weeks ago.

I've found that in quite a few categories, I'm getting some of the craziest, irrellevent results.... I even searched for a particular restaurant in my area, and while it's the only Chinese place in the town, it came-up at about #150, with all kinds of crazy, unrelated nonesense ahead of it.

Hate to say it, but based on what I've seen with my sites, and Google lately, I don't think I can trust its results (as a consumer) as much as I can, say, Yahoo's, which is much more likely to return what I'm expecting, in practical experience.

[summerherekids]

I've had nothing but great results with google. I didn't even experience the dreaded sandbox effect.

Whatever they're doing, I certainly hope they dont change a thing. I am swamped in leads because of google.