I basically did the same thing.  Got the same result with 3 different TIF files.

I only added a change to the Caption IPTC.

TIFFs were 8-bit.  Don't remember right now if they were created, in Lightroom, directly from the RAW file or from an intermediate TIFF (result of round trip to PS).  I would not expect Qimage to alter a RAW file.

I have since made changes in LR to both the Caption and Description.  These changes did not result in any data "clobbering".

My OS is Win7 64 bit.

It will be a few days before I can do add'l testing as I have relatives visiting.

John

BTW...when you tested, what date changed.   The originaldate or createddate (can't remember) should never change and should be the date that Qimage picks up in the Floating Text or EXIF date to print.....not a last modified date.

Here (jpegs below) are the data from 'Floating Text' before and after making a change to the caption.

Here is EXIF data from Irfanview.  Note that it "clobbers" quite a bit of data, including original date.

 Original (but different tiff from the original)

Filename - 2008-09-30_09-34-39-2.tif
ImageWidth - 2460
ImageLength - 1640
BitsPerSample - 8 8 8
Compression - 1 (None)
PhotometricInterpretation - 2
Make - Canon
Model - Canon EOS 5D
StripOffset - 56794
SamplesPerPixel - 3
RowsPerStrip - 1640
StripByteCount - 12103200
XResolution - 240
YResolution - 240
PlanarConfiguration - 1
ResolutionUnit - Inch
Software - Adobe Photoshop Lightroom 3.4.1
DateTime - 2011:07:09 07:45:24
Artist - John Schwaller
Copyright - ©John Schwaller
IPTC/NAA - 32892
ExifOffset - 56322
InterColorProfile - 55782
ExposureTime - 1/320 seconds
FNumber - 7.10
ExposureProgram - Normal program
ISOSpeedRatings - 400
ExifVersion - 0230
DateTimeOriginal - 2008:09:30 09:34:39
DateTimeDigitized - 2008:09:30 09:34:39
ShutterSpeedValue - 1/320 seconds
ApertureValue - F 7.10
ExposureBiasValue - 0
MaxApertureValue - F 4.00
MeteringMode - Multi-segment
Flash - Flash not fired, compulsory flash mode
FocalLength - 105 mm
FocalPlaneXResolution - 3086.93
FocalPlaneYResolution - 3091.30
FocalPlaneResolutionUnit - Inch
CustomRendered - Normal process
ExposureMode - Auto
White Balance - Auto
SceneCaptureType - Standard


Changed file:
Filename - 2008-09-30_09-34-39.tif
ImageWidth - 2460
ImageLength - 1640
BitsPerSample - 8 8 8
Compression - 1 (None)
PhotometricInterpretation - 2
Make - Canon
Model - Canon EOS 5D
StripOffset - 35080
SamplesPerPixel - 3
RowsPerStrip - 1640
StripByteCount - 12103200
XResolution - 240
YResolution - 240
PlanarConfiguration - 1
ResolutionUnit - Inch
Software - Adobe Photoshop Lightroom 3.4.1
DateTime - 2011:07:01 10:27:32
Artist - John Schwaller
Copyright - ©John Schwaller
IPTC/NAA - 11526
ExifOffset - 34608
InterColorProfile - 34068
ExposureTime - 1.2 seconds
FNumber - 233.62
ExposureProgram - Normal program
ISOSpeedRatings - 400
ExifVersion - 0230
DateTimeOriginal - ˆû~@BVLV@B
DateTimeDigitized -

i

ShutterSpeedValue - 1/1 seconds
ApertureValue - F 1.#J
ExposureBiasValue - 0.96
MaxApertureValue - F 4097.17
MeteringMode - Multi-segment
Flash - Flash not fired, compulsory flash mode
FocalLength - 105.00 mm
FocalPlaneXResolution - 0.00/0.00
FocalPlaneYResolution - 0.00/0.00
FocalPlaneResolutionUnit - Inch
CustomRendered - Normal process
ExposureMode - Auto
White Balance - Auto
SceneCaptureType - Standard

Mike,

I, for the first time, modified the IPTC data on a TIF file.  The only entry I made was to the Comments field.

After doing that I noticed that some, not all, of the EXIF data was changed.  I tested some add'l files and got the same thing.

I assume that this should not happen.  I did not test on a jpeg, as I usually print from TIFFs.

John

Fred...

I understand there are lots of ways to skin this cat.  What I am suggesting is a UI improvement that will speed selection and workflow....not slow it down.

John

Mike...

I was wondering if it would be possible to make the cutout preview window, so it could be resized.  First to show more items....then, to have the ability to show larger views of the previewed items....this could be resizable thumbs, or a popup to show more detail of the cutout.

At your suggestion, I asked Fred and Terry for some of theirs.  Now I have the "problem" that I would like to more easily review/select them...and, I suspect, I will compound the problem by making some of my own :-)   Plus, some of the cutouts have slight differences, which are difficult to distinguish in a small size.

Thanks...JOHN

http://blog.kasson.com/?p=487

Nice set of blog posts....

http://blog.kasson.com/?p=527
http://blog.kasson.com/?p=537
http://blog.kasson.com/?p=548

John