Big THANKS for taking care of this bug.
It's really annoying and I though it was forgotten.
1. I confirm the bug is not fixed in the version provided by jens. It's still present on my up to date debian wheezy installation and build 7157 from jens test repository. It's even worse now. When checking for presence of this bug I do a lot of copy/paste. Usually the data is pasted correctly, sometimes it is not pasted(one in 3 to 5 tries), but on rare occasions(but enough often to reproduce the behavior in less than a minute, ~ones in 50 tries) the whole application crashes and gives me an option to send some crash log(sometimes it doesn't, it just disappears). I sent the log twice.
2. I confirm using xfce4. Moreover after checking the apt-get log i found that quite some packages for both gtk and xfce4 were updated. Especially xfce looks much different than previous version. The problem is with both stable and testing builds of C::B and I think the stable one worked well before the updates.
EDIT: added info about crashes