You can safely ignore this message. Because there are up to several hundred people using JonDonym, now and then are some which are using automated search programs in combination with Google. But Google does not tolerate this at all and is blocking JonDonym shortly.

Unfortunately it can take a while until Google's search is usable again. Sometimes it helps to change the JonDonym-service in JonDo. Alternatively, there is the opportunity to use an other search-service, e.g. Bing or Ixquick.