So today it went completely unnusuable, lagging my PC, freezing or entirely crashing at will. It took me 3 hours to backup my contact list, clear out said contacts from 70% of people, remove my chat history (500 mb) and restore Skype into more or less usable status, without delaying my messages by at least 30 minutes or so.
Not only that, somehow dealth with all the annoying adds that suddenly popped up (they were not the case before the incident) and managed to cut them away without turning Skype into useless, virtually scorched app. Feels like winning a classic boss battle on hardcore mode.
So yeah... I might've deleted someone important from disco. No offense.
That was my solution to the advertisements. Works very well except it had me to run Internet Explorer again... Final effect was worth the effort anyway.
Still running 5.something, hopefully it will be supported a bit longer, did you set your chat history do autodelete every week or so? Because 500 MB of history seems to be a lot.