This only applies if the operating system on the computer, like Microsoft Windows, attempts to switch the keyboard to Scan Code Set 2. Linux implementations typically choose to use Scan Code Set 3, if it is available, by default, and therefore a 122-key keyboard, under Linux, will behave more like a 101-key keyboard instead of like an 84-key keyboard. This, however, brings with it its own set of problems, because some less-expensive keyboards are known to have problems with their Scan Code Set 3 implementations.
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Your welcome, have you found any collisions yet?
quadibloc.com/comp/scan.htm has a lot of detail about it