Ever had your website entering google filter?

[webby]

Has anyone experianced your website to just vanish from the google search results because it has entered into google filter. My site used to rank 4th for a competitive keyword and one day when I searched that keyword, I found my site just vanished, I searched a few pages but wasn't there. I was so shocked and scared because this was one of the great traffic source for me. I then went to the last page till it goes and clicked on "Show all results including filtered ones". Now I saw my website back at 4th position. I got so freaked. I sent and email to google, via their form "Not happy with results". And then it got back fine within a day.

[Moonface]

If your site has any adult material, you risk getting filtered.
Having said that, Google like any company of the same scale, do make occassional mistakes...