Need help: serialization class and binary compatibility

[xTs]

BinReloc successfully initialized.
Executable path: /home/xts/source/vdrift/build/vdrift
Data dir: /home/xts/source/vdrift/data
Localedir: /home/xts/source/vdrift/share/locale
No data_dir found in VDrift.config, using /home/xts/source/vdrift/data
Found config file /home/xts/.vdrift/controls.
Found config file /home/xts/.vdrift/VDrift.config.
No data_dir found in VDrift.config, using /home/xts/source/vdrift/data
Version of game: development-full
Skin name not found in config file...
OGG Vorbis loading: 4/5 = 80% FAIL
Performance testing Sample16bit (240ms for 1 second of 44.1khz stereo audio with 32 sources): 1/1 = 100% PASS
Performance testing SampleAndAdvance16bit (64ms for 1 second of 44.1khz stereo audio with 32 sources): 1/1 = 100% PASS
Performance testing SampleAndAdvanceWithPitch16bit (234ms for 1 second of 44.1khz stereo audio with 32 sources): 1/1 = 100% PASS
Performance testing SampleAndAdvanceWithPitch16bit with 1st order filter (475ms for 1 second of 44.1khz stereo audio with 32 sources): 1/1 = 100% PASS
Sound callback testing: 512/512 = 100% PASS
Sound effects testing: 3/3 = 100% PASS
Sound filter testing: 1/2 = 50% FAIL
Sound management testing: 6/6 = 100% PASS
Sound source testing: 3/3 = 100% PASS
Wave loading 44k s16 c2: 5/5 = 100% PASS
TOTAL: 538/540 = 99.6296% FAIL
Drawable filtering: 4/4 = 100% PASS
Scene node and drawable deletion: 4/4 = 100% PASS
Scene node and drawable management: 6/6 = 100% PASS
Transform into and out of local space: 1/1 = 100% PASS
TOTAL: 15/15 = 100% PASS
Pointer/bipointer allocation/deallocation: 13/13 = 100% PASS
TOTAL: 13/13 = 100% PASS
[---------------- RUNNING TESTS ----------------]
Bus error