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Hello, You must go to your Webmasters Tools account and use Labs, Instant Previews, and check if there are any differences between different versions of the website and if Google detects any problems. If not, it's possible that in 5 september, you were blocking google from crawling resources such as css. I checked your robots.txt file, and it seems fine - as long as you do not want to restrict Google from indexing those pages. I wouldn't worry too much about it.

Google have made some changes mid August so that you can only submit a reconsideration for Manual actions. From Search Engine Roundtable: "reconsideration requests only work for manual actions, not for algorithmic actions. So it makes sense that Google only allow you to submit a reconsideration request, which they are now calling "request review," under the manual actions. It will lead to less reconsideration requests for Googlers to review and the requests submitted should be more on target." See: http://www.seroundtable.com/google-request-review-reconsideration-17214.html