Comment 6 for bug 284210

After looking at grub logfile I found that the setting to enable/disable this feature is located in /etc/defaults/kernel-helper-rc (I'm writing it from memory).

After commenting a line there, it comes back and appears to work as before.

Now the question is, what was the reason to disable it?
What I should look for? And how dangerous it is?
The changelog didn't mention much besides just disabling it.