To by pass this issue one dirty solution would be:
Dowload libgthread-2.0 debian package used under Ubuntu at:
http://91.189.94.219/natty/i386/libglib2.0-0/download The package installer would not allow you to install it because a more recent version is available on your distro. To resolve this, extract the deb archive and copy theses 2 files with root priviledges under /usr/lib/ :
- libglib2.0-0_2.28.6-0ubuntu1_i386/usr/lib/i386-linux-gnu/libgthread-2.0.so.0
- libglib2.0-0_2.28.6-0ubuntu1_i386/usr/lib/i386-linux-gnu/libgthread-2.0.so.0.2800.6
If necessary you'll have to do update your database:
sudo updatedb
Then soapui 4.0 should start without freezing at all and wihtout the boggus error message above.