Skype can be really annoying. The protocol is not open, it is acting up quite often, it features unreliable file transfers, etc. However, at the moment it is only slightly annoying. What on earth is this funny orange symbol supposed to, well, symbolize?
After quite some looking around on the Skype page I could not find any information (besides that the symbols in version 4 for Windows are supposedly changed because the old one were too confusing...). So I asked Google. And found an article about the symbols of Skype at
TheVOIPGirl which covers the icons I already guessed; the second part of the icon collection does not help either. But in the comments is the solution to my confusion, the strange orange icon apparently means that the user is offline but has a call divert activated. Okay. Good to know?