works here in Ubutnu Linux with Chromium and with wget.
It only works in wget if you put " " around the URL, which contains special characters. Otherwise I do get 403 forbidden. I receive a jpeg file, 5.1k. It looks like the same drawing I get on chromium. The URL produces a picture of some kind of rough drawing with black lines.
wget version is 1.13.4
chromium about:
Chromium 25.0.1364.160 (Developer Build
25.0.1364.160-0ubuntu0.12.10.1) Ubuntu 12.10 OS Linux WebKit 537.22 (trunk@137939) JavaScript V8 3.15.11.16 Flash 11.2 r202 User Agent Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.22 (KHTML, like Gecko) Ubuntu Chromium/25.0.1364.160 Chrome/25.0.1364.160 Safari/537.22 Command Line /usr/lib/chromium-browser/chromium-browser
--flag-switches-begin --sync-keystore-encryption --flag-switches-end Executable Path /usr/lib/chromium-browser/chromium-browser Profile Path /home/pb/.config/chromium/Default Variations b03ddc1f-2d9ef0cc f9b252d0-fd526c81 ca6785ad-766fa2d 3709139-766fa2d 977e9dfe-766fa2d 7f6da4bf-37924bda 75f7fb7e-611a9f49 262f996f-eeefeb17 24dca50e-455c9cca 3028188e-b9bbd1b6 246fb659-a90023b1 f296190c-f911fcfa 4442aae2-a90023b1 75f0f0a0-4ad60575 e2b18481-cdc3d902 e7e71889-4ad60575