Known Bugs - NEWS V5.7

1 - When the item number exceeds 32,000, display and selection of item
    numbers does not function correctly.

    Item numbers are stored as unsigned 16 bit values. Some parts of the code
    treat this value (incorrectly) as a signed value, causing the problem.

    The first fix would be to change all signed references to unsigned, but
    this is only delaying a subsequent problem of the item number exceeding
    64,000. In this case the item numbers will wrap back through 0, but the
    user context files will assume that these new items have already been
    viewed.

    What is required is a method of automatic re-sequencing of item numbers,
    tied with a method of resequencing the user context file item references.