Dear Maintainer,

I was trying to view a PNG with the following properties:
05_Xak_2_-_Het_Kasteel.png: PNG image data, 6000 x 26000, 8-bit/color RGB, non-interlaced
(it can be downloaded here: http://www.msx.org/downloads/xak-ii-map )

It works, but it's using over 1GB of RAM:
  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
 6427 manuel    20   0 1534,9m 1,022g   4,0m R  15,0 13,1   0:04.99 xloadimage
 4321 root      20   0  786,4m 669,1m  40,4m R  99,4  8,4   0:31.05 Xorg

as you see, also quite some in Xorg... After killing that xloadimage process it goes down to:

 4321 root      20   0  191,3m  74,0m  40,4m S   0,7  0,9   0:32.33 Xorg