I'm trying to open and/or save the images from The Language Atlas of the Pacific Area (http://ecai.org/austronesiaweb/PacificAtlasImageMaps.htm) and meet a strange effect: the smallest and, seemingly, noncomplicated pictures fail on iOS. An example of one is: http://ecai.berkeley.edu/austronesiaweb/maps/pacificatlas/Pacific_legends/L026G.jpg . It's just 415x443 pixels, trivially opened on PC, but any attempt (direct open, downloading, sending myself through e-mail) leads to unreadable file.
If I just copy and paste the file into arbitrary graphic editor and save, again as JPG, the resulting file opens. What's the matter with this particular file?