Jpg images damaged by lightroom?!

I run a 2.1 lightroom version on my Mac G4. I am recently shooting in jpg instead of RAW and handling the images with lightroom. But I am experiencing a serious problem: some images, after manipulation, are damaged in different ways:
1) the image is divided in "slices" or
2)a vertical or horizontal strip appear on the image or
3) complete chromatic alteration of the image as it was "creatively " manipulated.
Also going back in the history, the image remain altered.
These alterations do not occur at the moment of making the adjustments, but after some time (hours or the following day..).
Any help? did somebody experienced this problem?
thank you
Antonio Baiano

I have seen corrupted jpg files and reported it here. Of course, I cannot absolutely say that it happened in LR but I have never had corrupted jpg files before I started using LR. They don't appear to be corrupt to the file system, so they are happily written to backups. Hence, I now keep originals outside of LR for images I really care about. (Now how many copies of everything do I try to maintain now?)
I don't have metadata saved automatically to the files, but theoretically (if I could trust it) I would like to have it in the files and I do try to write out by project after I've worked on the project.
Of the cases where there was damage I was able to retrieve the original from my "originals" backup and they were fine. Of course I exported, looked at the original using the file system, etc. All bad.
I'm running windows xp.

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    You either want to learn, or you don't.  You either want to solve your problems, or you don't.
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    Good luck.
    Wo Tai Lao Le
    我太老了

  • Image Quality of Lightroom vs Nikon Image Processing Software

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