The scene:
I have Win 10 and the latest version of Skype for it.
A contact has the latest Mac version of Skype on his Mac.
Everything works as far as normal calls/video/Instant Messaging go...

But:
Try to send a file (usually an image) the way you USUALLY do in Skype, and...
He gets a link to click on, and there he has to sign in again to receive the file
(at least we think so, as we haven't bovvered to do so).

And then:
If he logs into the Windows (7) version of Skype that he has, there is NO SUCH PROBLEM/Step
involved in sending and receiving the file. It just downloads in his open session of Skype.

Qs:
Have other people found this when communicating cross-platform using Skype?
Is there a simple solution (like use Yahoo Messenger instead)?
Do you find it is "Improving your Skype Experience"?
Any good expressions to use in a fit of pique?

Ta.
Am.