(...) That's probably it - the fact that it's hosted by a different server. Though, since it's from the same TLD, it shouldn't be an issue. FWIW, my ZA doesn't block any lugnet images. (18 years ago, 5-Sep-06, to lugnet.admin.general)
(...) It could be that there are settings for ZA that make it quite touchy when it comes to image links. This would block quite a number of useful web links however, so it's probably a setting you do not want in the first place. Just btw., even (...) (18 years ago, 6-Sep-06, to lugnet.admin.general)
Gereon Stein