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	PNG Reference Library: libpng err_buff.png

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err_buff_before_idat_png: err_buff_after_idat.png:

When the bad chunk appears after IDAT, applications do not do anything interesting for me, other than to print out the expected error message due to finding an unknown chunk.

• Netscape 4.8 doesn't even report the error. The "before_idat" image causes a broken-image icon to be displayed.
• Mozilla-1.7rc1 without MNG support, displays the "after_idat" image and no error message.
• Mozilla-1.7rc1, with MNG patch 040504, and using libmng to support PNG, (to be checked)
• Pngcrush and pngcheck merely report the bad chunk.
• Firefox 0.8+ with Jason Summers' MNG plugin displays the "after_idat" image as if there were no error.