In reply to:

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I trust that ver.4 doesn't crash due to the QuickTime issue (which was never patched for version 3 users?.

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That appears to be the case. I rebuilt the directory on both my drives and had no issues whatsoever. If anything, DW 4 seems to work even faster than DW 3.

Contrary to your sage advice, I also contacted Alsoft about this issue. The reply:

Hi Jonathan--

I downloaded the current version of MacTracker and receive the same
message in the DiskWarrior FileTest.

We looked at the file "extras.rsrc" and it does not meet the criteria as
an actual .rsrc file. There is no header data.

However, this doesn't mean that the MacTracker application itself isn't
aware of this and functions just fine with the file in this format. They
may have tacked the .rsrc suffix on for some reason unbeknownst to us.
However, the suffix alone does not make a proper .rsrc file.

Ultimately, you can simply ignore the message in DiskWarrior - we're
reporting it properly, but it obviously doesn't seem to have an effect on
the functionality of the MacTracker database itself.

-- Marc

So, I feel quite comfortable ignoring DW's error message.

Happy New Year!

As that sage wrote: "I hope you can now see clearly that you can forget this whole matter".   

FWIW my prognosis now is that the developer of MacTracker is fed up with hearing about this and will in his next release be using a different format for his prefs file. Whether or not that prognosis proves correct the advice remains as quoted!   

I may have a similar issue with some .bin files from a statistical program Instat3 (GraphPad Software). Tech Tool Pro 4.5 reported all files to be fine but DW 4 said that three files were damaged and could not be repaired. May be the same issue because the program works fine.
On another note, there is another interesting glitch in file identification with DW 4. When you have a comparison of old and new directories in DW on PPC (2.3 GHz DP G5, 1 GB RAM, OS 10.4.8), the program correctly identifies Word 2004 files with a .doc suffix as Microsoft Word files. However, the Excel files with .xls suffix are identified as Unix executable files and their icons are shown as black rectangles. Did not have PowerPoint files at root level so cannot tell. Upon rebuilt, the Excel files show properly so it is probably not dramatic. Overall, Hal may be right that DW file checking is not perfect.
Alex
2 GHz MacBook Pro, 1 GB RAM, OS 10.4.8, Office 11.3.2