Comment 1 for bug 1423657

Oh, looks like this may have had something to do with recent updates to nss and related packages that I just received after I posted this bug report:

zooko@spark ~ $ tail /var/crash/_usr_bin_blueman-manager.1000.crash
SourcePackage: blueman
Tags: trusty
Title: blueman-manager crashed with DBusDoesNotExistError in warp(): Device creation in progress
Uname: Linux 3.18.7z28-slub-cfq-preempt+ x86_64
UnreportableReason:
 You have some obsolete package versions installed. Please upgrade the following packages and check if the problem still occurs:

 libblkid1, libcgmanager0, libmount1, libuuid1, mount, util-linux, uuid-runtime
UpgradeStatus: Upgraded to trusty on 2014-08-11 (192 days ago)
_MarkForUpload: True

zooko@spark ~ $ time sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  bind9-host bsdutils dnsutils libbind9-90 libblkid1 libcgmanager0 libdns100
  libisc95 libisccc90 libisccfg90 liblwres90 libmount1 libnss3 libnss3-1d
  libnss3-nssdb libuuid1 libuuid1:i386 mount util-linux uuid-runtime
20 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 1,116 kB/2,951 kB of archives.
After this operation, 6,144 B of additional disk space will be used.
Do you want to continue? [Y/n]
Get:1 http://security.ubuntu.com/ubuntu/ trusty-security/main libnss3-nssdb all 2:3.17.4-0ubuntu0.14.04.1 [10.6 kB]
Get:2 http://security.ubuntu.com/ubuntu/ trusty-security/main libnss3-1d amd64 2:3.17.4-0ubuntu0.14.04.1 [9,304 B]
Get:3 http://security.ubuntu.com/ubuntu/ trusty-security/main libnss3 amd64 2:3.17.4-0ubuntu0.14.04.1 [1,096 kB]

Please close this ticket for now.