Following on from that and a bit off topic but...
tweet.JPG
Windows often amuses me and often frustrates me too. Then again, this may not be (just) a Windows problem.
So... the symbol that I use for wind in the tweet displays fine on my four Windows 10 systems. I admit that I have never seen it before and am not sure what it represents (there is an anti-clockwise version too). It is from the Helvetica Neue font that Twitter (and some other social media) uses.
Now, although that font shows as installed in File Explorer and displays fine in my apps (e.g. Word, Corel, etc.) the one place it doesn't show is Character Map. Fortunately, the same symbol is in Arial (and probably other fonts) so I pulled it in from there.
Also, what I have noticed is that the resultant Tweet displays fine under Chrome, Water/Firefox, IE, Opera and other browsers on my Windows 10 systems but the wind symbol is a blank square on my Windows 7 Pro system.
On my Android tablet, none of the symbols that I use for temperature, wind and rain display at all in Chrome, Dolphin and Photon browsers and the/a Twitter app.
In Firefox, all display fine except this wind symbol that displays as a black square and it displays as a blank square in Puffin.
I'm struggling to understand the implication. I used to create fonts, although that was BM (Before Microsoft) and I'm not sure what the technical process is for getting it from server to screen.