2.7.4:

Overburn support in GConf
Easier to use user interface, including removal of the "Erase CD" checkbox
Simplify the HAL specific code
Remove the eel dependency in nautilus-cd-burner itself
Fix a crash when selecting the File Image target
Fix the "dummy" option appearing when not in debug mode
Some memory leak fixes

2.7.3:

Remove the libstdc++ dependency on FreeBSD 5.x
Fix the HAL requirements
Fix possible crashes in BaconCdSelection