Bug reporting page versions in Whistler builds 2250.main.000628-2110 and 2257.idx01.000810-2103 state: 5.00.00.5118. This could be a reference to a Neptune build. However, bug reporting page in Whistler build 2223.1.main.000411-2307 is the last to dump bug reports into
C:\neptune_bugs. As of build 2250.main.000628-2110, bug reports are dumped to
C:\Whistler_bugs, which suggests that these bug reporting pages were changed since Neptune or even completely rewritten and simply continued the version numbers.