A schema validation error has been detected

Recently i have recieved the following error :

A schema validation error has been detected at line 54409, position 16.

This error shows up if you want to import a customizations file which has been exported from a system which has the Update Rollup package 1 installed.

VisibleToPlatform 0 /VisibleToPlatform

VisibleToPlatform 1 /VisibleToPlatform

There may be multiple reasons for this error to show up, but at least one of them is the existence of one of these lines in your code:

To solve the error message, just remove the line from the code or install the rollup package 1. For information and download of the package go here: http://support.microsoft.com/default.aspx/kb/922815