hosting provider web server blocks certain url string by using mod security

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http://serverfault.com – I have a blog which has a post with the following as url /blog/insert-into-tablea-select-fields-from-tableb-for-specific-values-only/ This was working well until recently. I got a different HTTP Status like 412 Precondition Failed which is not caused by request i am sure of it. They just want to send a status code. All other urls are working except this. When i questioned them they said that they have added mod security and that would have prevented. And they removed mod security for my user profile yesterday and the page is loading well. The same has been done for mysql... certain (HowTos)