The version number is perfectly valid.
Also there is certainly a changelog:
wing-commander scott% dpkg -L udev | grep changelog
/usr/share/doc/udev/changelog.gz
/usr/share/doc/udev/changelog.Debian.gz
** Changed in: udev (Ubuntu)
Status: New => Invalid
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udev 147 missing changelog and may be it has bad version number
https://bugs.launchpad.net/bugs/433428
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