From: Iñaki Baz Castillo on
Hi, the folowing code encodes and decodes a image file as Base64:

- Encode "icon.png" in Base64 as "base64.txt":
--------------------------------------"base64.txt","w") do |file|
file.write [open("icon.png").read].pack("m")

- Decode "base64.txt" as a PNG "new_icon.png" file:
--------------------------------------'new_icon.png', 'wb') do |file|
file << (IO.readlines('base64.txt').to_s.unpack('m')).first

It works perfectly under Ruby1.8 (after encoding and decoding "icon.png" is
exatcly the same as "new_icon.png", the same binay file).

However running under Ruby1.9 the result is different since "new_icon.png" is
a corrupted image file. When I try to open it with a image viewer I get this
error (under Linux):

libpng warning: gAMA: CRC error
libpng error: PNG unsigned integer out of range.

Which is the difference when using Ruby1.9? how to solve it?
Thanks a lot.

Iñaki Baz Castillo <ibc(a)>