[Kde-imaging] [Bug 197218] New: MetaDataEdit corrupts CRC information in PNGs

[Michael G. Hansen]

https://bugs.kde.org/show_bug.cgi?id=197218

           Summary: MetaDataEdit corrupts CRC information in PNGs
           Product: kipiplugins
           Version: unspecified
          Platform: Debian testing
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: metadataedit
        AssignedTo: kde-imaging at kde.org
        ReportedBy: mhansen at mghansen.de


Version:           0.3 (using KDE 4.2.4)
OS:                Linux
Installed from:    Debian testing/unstable Packages

Performing any of the operations that the MetaDataEdit-plugin provides on PNG
images leads to corruption of the CRCs in the PNG, as shown by the following
libpng warning messages:
libpng warning: zTXt: CRC error
libpng warning: iTXt: CRC error

These are printed to the console by most programs (gimp, kuickshow of kde3,
digikam) that open these modified PNGs. All image-data seems to be intact,
however (verified using compare of ImageMagick). I only stumbled upon the
problem because "pngcrush" aborts on any libpng warnings.

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