I did't test that virtualbox-ose-modules-generic, but kernel got updated on version 2.6.24-19-generic and there was right package ( virtualbox-ose-modules-2.6.24-19-generic ) for this kernel version. There still isn't version virtualbox-ose-modules-2.6.24-18-generic. Somehow version virtualbox-ose-modules-2.6.24-18-generic is skipped on AMD64 version.
I did't test that virtualbox- ose-modules- generic, but kernel got updated on version 2.6.24-19-generic and there was right package ( virtualbox- ose-modules- 2.6.24- 19-generic ) for this kernel version. There still isn't version virtualbox- ose-modules- 2.6.24- 18-generic. Somehow version virtualbox- ose-modules- 2.6.24- 18-generic is skipped on AMD64 version.