Sorry for the big image.
Basically the logging is intentionally missing some lines (and this is the first time I tried taking screenshots).
This happened earlier and a few days ago.
I am not sure how to reproduce.
Windows 7 Ultimate x64 (6.1.7600)
Windows Live Messenger 14.0.0726
Messenger Plus! Live 4.83.0.376
Skin: fuse 1.0.2
Here is my logging options if they are needed.