Just Installed 10.9 from 10.8.5 from scratch(follow the doc) on two D630 and updated to 10.9.2 with no problem.
Latitude D630, BIOS A18, C2D T8300 2.4GHz, 4Go DDR2-800, nVidia Quadro NVS 135M, 1440x900, ML 10.8.5/Mav 10.9.2
Latitude D630, BIOS A18, C2D T9300 2.5GHz, 8Go DDR2-800, nVidia Quadro NVS 135M, 1440x900, ML 10.8.5/Mav 10.9.2 (testbed)