No error on non-writable logs directory?

[eluser]stefanhapper[/eluser]
Do you agree that this is a bug?

It seems that when the system/logs is not writable all controllers display a blank page (or maybe better to say, no page at all) instead of an error.

I am referring to the Forum thread http://ellislab.com/forums/viewthread/71904/

This should at least be put in the "troubleshooting" section of the user guide.