It looks like the last working gtk+2.0 was gtk+2.0_2.16.0-1ubuntu4. gtk+2.0_2.16.0-1ubuntu8 has the same problem and there are no sources for any releases between those two.
It looks like the last working gtk+2.0 was gtk+2.0_ 2.16.0- 1ubuntu4. gtk+2.0_ 2.16.0- 1ubuntu8 has the same problem and there are no sources for any releases between those two.