Some of my sites seem to be in Googles "Sandbox". Means the keywords dropped extremely, no more traffic. Most keywords were in the Top 20, some even in the Top 10. Now they are in nowhere or position #50-70 since about two weeks. All pages are indexed and I got no message on Google Webmaster Tools - so its not penalized. Many people told me its the sandbox effect. Any idea how to fix this one? I am sure some of you guys have been in the same situation.