Unknown if this still happens, opening here for tracking.
There were some bugfixes regarding this (the use of '2>&1' redirects)
about 10 months ago, but bears closer investigation..
I guess this should be fixed both in hotplug and kernel, but it might
still not hurt to do some fixing here as well..
Also see: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=86210
for an earlier, specific case of this.
Some minor changes added in CVS (of the redirecting grep's stderr to
Created attachment 105342 [details]
the aforementioned changes.
Closing this for now. Please reopen if someone sees this.