I had an issue last week where someone tried to call my skype number both from an office phone and from an AT&T mobile blackberry and they were told the call could not be completed because the number was a Skype number. The person calling me didn't know it was a Skype number so I know that is what the message said.
Today I was on a call. It dropped. The person tried to call me back on my skype number and he said he got a strange message from a robot saying something about text messaging.
He called back again and the call connected but I could not hear him. He called back again, got through, but we had considerable audio gaps. Finally I called him back on a land line and we had success.
There are so many variables here! Not sure what is going on.