Here the same problem. Almost 100 % sure that the problem is the kernel power, cause I update it today, and it doesnt work. Another clue that prove that the kernel is the problem is that i have 3 entries in my n900 boot screen:
1.Maemo original kernel
2.Maemo titan's kernel
3.and nitdroid

In the OC kernel, doesnt work. In Nokia kernel works perfectly...so i guess we have to wait for updates..