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Full Version: I received this error "Disallowed Key Characters"
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How to rectify

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Try clearing your cookies, they may have values with disallowed characters.

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My mistake:
<input type="field_type" name=\ field_name" value="" />

This was Message is very useful to me

You can check the form that sends data to your page, i.e.:

if there is a code
<input type="field_type" name=" field_name" value="" />

if there is an unnecessary space in the field name Firefox removes it and everything is ok, but IE doesn’t make this cleaning, and this is a problem….