Site got down in Google.si?

[Anil Kath]

Hi Harry,

There are a many reasons why pages drop in rankings, and I don't know where to start, so I'll just list 'em all. And especially for Google.

There can be changes to the algorithms in search engines.
Duplicate content / canonicalization issues.
Broken links (self-explanatory)
Server problems.

Lastly, over-optimized" or "overly SEO is main issue these days as Google’s Matt Cutts announced that Google is working on a search ranking penalty for sites that are “over-optimized” or “overly SEO’ed.”

http://searchengineland.com/too-much-seo...ing-on-an-"over-optimization"-penalty-for-that-115627

Good Luck.