[Image-SIG] png read/save error on x86_64

[Anchi Cheng]

Hi, there,

   I can't read or save PNG files from image
on x86_64 machines running Linux with either
PIL 1.1.5 or 1.1.6.  No problem on x86_32.
For saving, got encoder error -8.
For loading, got IOError: bad configuration
when reading image file.

   Please help!

   Anchi