Just got bit by this, and wasted part of a night. I'd class it as a usability killer that warrants pushing out a stable release immediately.
If I install a nightly with the fix, will that get automatic updates in the stable channel? I'm setting up a Pi + affected USB Hard drive as a present for someone, and won't be able to maintain it once I give it to them - so probably don't want to leave it on a nightly.