Apparently images presented using the standard Forum BB code (like this)
[img]http://forum.arduino.cc/index.php?action=dlattach;topic=519037.0;attach=239016[/img]
are not visible on some versions of Internet Explorer. Until such time as the Forum programmers fix this you can help IE users by adding ;image to the BB code so that it looks like this
[img]http://forum.arduino.cc/index.php?action=dlattach;topic=519037.0;attach=239016;image[/img]
...R
PS this text first appeared in Reply #13