Skype's epic failures

I was struggling on a Mac to get connected to Skype.... Internet is working fine, but every time I try to set my status to "online", it goes back to "offline" without an error message.

Finally I had to restart the whole Mac...
I try to post this issue on Skype forum, so I need to register, I clock on the "Join Us" button and I get this:

Oops!
Sorry we cannot process your sign in request further
Error
A return address was specified, which is not allowed. 

ridiculous.

I was always amazed how a very unstable and buggy piece of software like Skype can have so much success.... the message is: you don't have to be perfect to be successful ! It's mostly about marketing with a brazen face, and provide some sort of solution to some very basic need....