that's a bummer. so i guess this won't be fixed in the foreseeable future at all, right? ...just to avoid any misunderstanding, this means that 7z.exe x file.7z -oC:/path/with/260/chars will always fail to extract anything, regardless of the contents of file.7z.
short path and forward and backslashes work: 7z.exe x file.7z -oC:/TEMP 7z.exe x file.7z -oC:\TEMP long paths with backslashes also work: 7z.exe x file.7z -oC:\very\long\path but long paths with forward slashes break: 7z.exe x file.7z -oC:/very/long/path ERROR: Can not open output file : The system cannot find the path specified. : C:/very/long/path\and\then\path\inside\archive\and\then\some\more\to\get\above260\chars\foo.jpg every file in the archive which has a full path of over 260 characters...
Installer puts empty dvipdfmx.cfg into ProgramData