Fedora 24 KDE no joy

I recently upgraded from FC21/KDE to 24, x86_64. Audacity ran OK under 21,
except for occasionally hanging.

I've now got audacity-2.1.2-4.fc24.x86_64 installed, but when I try to
start it I get:

$ audacity

(Audacity:15631): GLib-GObject-WARNING **: cannot register existing type
'GdkDisplayManager'

(Audacity:15631): GLib-CRITICAL **: g_once_init_leave: assertion 'result !=
0' failed

(Audacity:15631): GLib-GObject-CRITICAL **: g_object_new: assertion
'G_TYPE_IS_OBJECT (object_type)' failed

(Audacity:15631): Gnome-WARNING **: Accessibility: failed to find module
'libgail-gnome' which is needed to make this application accessible

(Audacity:15631): GLib-GObject-WARNING **: cannot register existing type
'GtkWidget'

(Audacity:15631): GLib-GObject-CRITICAL **: g_type_add_interface_static:
assertion 'G_TYPE_IS_INSTANTIATABLE (instance_type)' failed

(Audacity:15631): GLib-GObject-WARNING **: cannot register existing type
'GtkBuildable'

(Audacity:15631): GLib-GObject-CRITICAL **:
g_type_interface_add_prerequisite: assertion 'G_TYPE_IS_INTERFACE
(interface_type)' failed

(Audacity:15631): GLib-CRITICAL **: g_once_init_leave: assertion 'result !=
0' failed

(Audacity:15631): GLib-GObject-CRITICAL **: g_type_add_interface_static:
assertion 'G_TYPE_IS_INSTANTIATABLE (instance_type)' failed

(Audacity:15631): GLib-GObject-CRITICAL **: g_type_register_static:
assertion 'parent_type > 0' failed

then nothing.

I renamed my .audacity and .audacity-data directories but that didn't help.
I've googled to no avail. I even tried installing other sound editors but
the only one I could install, Sweep, died without explanation after asking
for a file to edit. I record my band's practices on a Zoom H2n and extract
a few songs for the other guys, but I'm dead in the water. :-( Any help
would be greatly appreciated.

-Dave

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*********** ASKING FOR HELP *************

When asking for help on this list, please include the following information, so we can 
help you properly: 

* What operating system you are using (for example, Windows XP or Mac OS X 10.5.1)   

* Exactly what three digit version number of Audacity you are using (Help > About 
   Audacity, or Audacity >  About Audacity on a Mac computer)   

* If this is a recording problem, what equipment you are recording with, and how is it 
   connected to the computer?

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