The bad news first. Skype on Windows 7, according my experience, protects its binary that way that API hooking is not feasible anymore :/
I’ll check an other source that can either confirm that or hopefully prove the opposite. But I’m quite sure they closed the leak.
The good news is : gtalk has the same symptoms as Skype had once. I’ll invest the remaining time to analyse the leak on gtalk…
But anyway … after finishing the gtalk stuff I’ll put my focus back on Skype. I’m sure there is an other way to do it. We just have to look a level lower closer to the hardware.