[png-mng-implement] Exact cause of libpng: decompression error

[Rich R. <rat...@gm...>]

I am writing an application that reads image data from a database and
displays it (using directFB) to a touch screen LCD.  On rare occasion, the
program crashes with the message "libpng: decompression error".  I was
wondering what were all the conditions that could generate this message?
Could it be the file is corrupt?  Or could it be an actual error internal
the libpng or z decompression?

System info:

zlib 1.2.3
libpng 1.2.12

Thanks,
Rich