Can you add a little more info? I think I am having the same problem. Here it is.
Just upgraded to the new version 5.7.6. Now, after signing in the program has trouble switching pages (ex. Contacts, History, etc.) I can't even see my contacts. I made a test call OK, but I haven't had the chance to call or receive a call from a real person. Also, on this version Skype's spinning circle thing seems to be moving more slowly. Is that normal, or a symptom?
Skype version 5.7.6
Mac Snow Leopard
4 GB Ram, 2.4 GHz Core 2 Duo