Site disappearing from search for a certain keyword

[webmasterles]

I was wondering if someone has encountered the same problem as me. I was doing some changes on the frontpage of one of my clients' website, especially some redirections, and my site has disappeared from Google for the main keyword on the page. So, if I look for my page on Google, instead of seeing my page first, I no longer see my page, at all. All I've done was a 301 redirection from index.html to the domain name. Now, I changed everything back to how it was before. More precisely, I've done that 2 weeks ago. But, no change in Google. I checked Bing and Yahoo, my site appears first when I search for that specific keyword.

Any ideas how long will it take for Google to see that I am not doing anything wrong with redirections? Or any idea at all?

[RobertFisher]

When you made the change back to original, did you resubmit the xml sitemap? I would give that a quick try. Also, to see if it is showing, Do a Site:exacturlofchangedpage  on Google. This should show if the page is there but not ranking for some reason.

[prunarevic]

You website may be in sandbox.

[AlanMosley]

I cant see a redirection doing this, i would put the redirection back, it is more likely some other reason.

[webmasterles]

Already resubmitted the front page to Google using Fetch as GoogleBot and Submit to index from Webmaster Tools. Also pinged the page to all main Google local SE. On the other hand, sitemap (or site in general) cannot be in sandbox, as it appears in more than 5000 daily searches :). And I have more than 1000 pages in index. And they all appear when I search for the main keyword of each and every page :).  The only issue is the main page.

Now, before it disappeared, I have noticed another strange behaviour. My front page displays, randomly, one article from a specific table in my database. Every time I was adding a new article, again the front page was gone from searches for a day or 2. Then everything was back to normal.

Still, my question is this: If something is wrong, why Bing and Yahoo are displaying my front page for the main keyword? And Google not? Somehow, the algorithms are not that different.