The illegal character validator ensures that there are no illegal characters in any of the item fields. These characters (usually 0x03) can cause problems when building an update package. The update package generator doesn't provide enough information to track down the issue.

This validator will alert the user to the item and field containing the illegal characters.

These characters usually show up in content that was pasted from a Word.

If the developer wants to search for other problematic characters, they can be added to the additional properties list