Ooops sorry, yes this behavior is ok. It’s a compromise. The issue is that our rendering engine runs on latest Chromium that doesn’t support XP/Vista anymore.
So we have 2 versions of rendering engine, old one for XP/Vista and the latest one for newer OS. The issue is that the older engine isn’t included in the offline installation package and is being downloaded during the installation. So when you are offline nothing can be downloaded and the installation crashes. Solution would be to add the old engine to the offline package as well but that would increase the size of installer for another ~20MB. This is not worth considering how many users is installing on Vista/XP in offline mode, because the size would increase for all OS.
