I agree - and confess I posted it with tongue in direction of cheek.
The change is announced in the first FODCOM of 2007
Paragraph 2.4 says "The newly adopted definition refers to ‘incorrect presence’ rather than ‘unauthorised or unplanned presence’. Therefore, incidents resulting from ATC error will now be captured as runway incursions i.e. those occasions when a pilot correctly follows the issued clearance but where the clearance itself was erroneous resulting in an ‘incorrect presence’ on the runway will now be defined as runway incursions."
The CAA asks AOC holders to ensure that notice of the change is copied to "......... relevant outside contractors, and to all members of their staff who could have an interest in the information or who need to take appropriate action in response to this Communication" and is notifying
Aerodrome Licensees and Air Navigation Services Providers separately - via a Notice to Aerodrome Licensees (NOTAL) and an Air Traffic Services Information Notice (ATSIN).