Just to add that mod_security (and to my knowledge suhosin) have been implimented on all eUKhosts shared servers since I have been a customer here (which is over 2 years) and from other forum posts when I first joined, a long time before that.
mod_security especially is considered an absolute must by any reputable hosting company that I have ever heard of a the hardening of PHP is done to prevent malicious code being executed on the server which would at best damage damage your account and at worst destabalise the whole server.
Glad that you have got your problem sorted
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