For those of you on Skype, I’ve noticed that when you install on different computers, one’s list of registered contacts doesn’t move to the new computer the way mainstream IM clients like MSN, Yahoo! and AOL do. This is a minor inconvenience and I imagine at some point in the future, Skype will remedy this.
On a related note, Skype tends to have a minor upgrade available every couple of months. I tend to install these as soon as they come out, if for no other reason, so that it’ll stop nagging me!
I’ve just upgraded to the latest and am happy with it; everything still works great. And of course, you won’t lose your contacts when upgrading on the same computer as you currently have it installed at.