exiftran writes bad EXIF data

exiftran should not be changing any exif data except the orientation tag and /or thumbnail, and probably image height / width. However the output file's exif data is being changed in unexpected ways, being filled with corrupt values.

Here is a diff of the before and after of the exif values of this file after the command exivtran -i -9 on this file:
https://dl.dropbox.com/u/352146/exif_test/P1070321.JPG

10c10
< Exif.Image.ExifTag Long 1 418
---
> Exif.Image.ExifTag Long 1 634
14a15
> Exif.Photo.SensitivityType Short 1 1
27c28
< Exif.MakerNote.Offset Long 1 920
---
> Exif.MakerNote.Offset Long 1 1148
40c41
< Exif.Panasonic.InternalSerialNumber Undefined 16 57 58 57 57 32 48 48 58 48 48 58 48 48 0 0 0
---
> Exif.Panasonic.InternalSerialNumber Undefined 16 88 49 52 49 49 48 54 48 49 48 48 53 55 0 0 0
51c52
< Exif.Panasonic.BabyAge Ascii 20
---
> Exif.Panasonic.BabyAge Ascii 20 9999:99:99 00:00:00
63,65c64,66
< Exif.Panasonic.LensType Ascii 34 :99:99 00:00:00
< Exif.Panasonic.LensSerialNumber Ascii 14
< Exif.Panasonic.AccessoryType Ascii 34
---
> Exif.Panasonic.LensType Ascii 34 OLYMPUS M.45mm F1.8
> Exif.Panasonic.LensSerialNumber Ascii 14 ABM234742
> Exif.Panasonic.AccessoryType Ascii 34 NO-ACCESSORY
71c72
< Exif.Panasonic.BabyAge Ascii 20
---
> Exif.Panasonic.BabyAge Ascii 20 9999:99:99 00:00:00
74,76c75,77
< Exif.Photo.PixelXDimension Long 1 3448
< Exif.Photo.PixelYDimension Long 1 4592
< Exif.Photo.InteroperabilityTag Long 1 8840
---
> Exif.Photo.PixelXDimension Long 1 4592
> Exif.Photo.PixelYDimension Long 1 3448
> Exif.Photo.InteroperabilityTag Long 1 9068
98,99c99,100
< Exif.Thumbnail.JPEGInterchangeFormat Long 1 8988
< Exif.Thumbnail.JPEGInterchangeFormatLength Long 1 6455
---
> Exif.Thumbnail.JPEGInterchangeFormat Long 1 9716
> Exif.Thumbnail.JPEGInterchangeFormatLength Long 1 6345

The proper values are those with the correct lens information.

Version is 2.07-10build1 on up-to-date raring.