Today I I have upgraded from gnome 3.4 up to 3.6.
Empathy was upgraded up to 3.6.3.
After upgrade I have noticed that history (previous conversations) shows my log
in wrong way (it looks like utf8 text interpreted as a single byte encoding
text): see screenshot.
I have checked that my logs in ~/.local/share/TpLogger/ are in utf8. Then I
downgrade empathy up to 3.6.2 and restart gnome-session. This is fixed my
problem. I have checked several times and can confirm that with empathy 3.6.2
the bug is not reproducible, but reproducible with 3.6.3.
I have filed upstream bug https://bugzilla.gnome.org/show_bug.cgi?id=692746
reading upstream report this is fixed in 3.8.3