Bug in Preview's Exif viewer (inverted GPS coordinates)?

Hi,
I've been scratching my head quite a lot over this one...
I'm finalizing an application that gets your GPS coordinates off your Google Latitude history and uses them to geotag your pictures. The idea is to make it easier to use the "Places" functionality of iPhoto, Picasa, etc...
Anyway, I cannot explain why Preview seems to display an incorrect longitude (it drops the "-" sign which places a California picture somewhere in China...) when Exiftool, Picasa and, yes, even iPhoto seem to get it right.
I know some of you will probably think I'm looking at 2 different pictures (I probably would think the same if I were you) but I've double, triple checked. In fact a simple "Show in finder" from iPhoto or Picasa will bring up the picture for me to double-click.
Anyway, see for yourself:
The picture in question
Exiftool
in iPhoto
in Picasa
in Preview
Any feedback appreciated.

tbertran wrote:
However, that would not explainwhy the very complete exiftool output is spotless (as far as I can tell). IPhoto and Picasa also get it right...
That's all well and good. But even if you have smoking-gun evidence that there is a bug in Preview (and it isn't a show-stopping bug either), it will be months, if not years until said bug is fixed. Until then, your output will not work in Preview. So, in any case, you are going to have to modify your code to produce output that Preview can read. Other applications are able to produce such files that Preview can understand. What is the difference?
My advice is to continue working with other tools to generate identical files with identical tags. Then find the difference in output between the other tool and yours. That should identify where the bug lies.

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Bug in Preview's Exif viewer (inverted GPS coordinates)?

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