John – NOT reproducible on 2008 R2!
One possible explanation is – someone turned off the 8.3 filename creation for performance reasons for THAT partition at some LATER date. That will NOT REMOVE any “old” 8.3 filenames created prior, but will not cease to create any NEW 8.3 filenames for newly added files/folders. Take a look at the directories that DO have 8.3 filenames – when were they created? At that time, that feature was still active on THAT partition. Now, compare that other directories on the SAME partition that do lack 8.3 filenames – do they have NEWER creation dates?
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