With newly released Opera 9.5, I can no longer read pdf files, Opera loads the plugin but keep displaying a blank screen.
In my shell, I have the following error messages:
(acroread:4109): Gdk-WARNING **: GdkWindow 0x240014d unexpectedly destroyed
(acroread:4109): GLib-GObject-WARNING **: invalid uninstantiatable type `(null)’ in cast to `GtkObject’
It looks like a gtk problem to me.
I did not find any matching entry on the web.