Looks like there is still an error.
See below the report from my execution of the update commands in Ubuntu 16.04 Xenial.
e6400@e6400-Latitude-E6400:~$ sudo add-apt-repository ppa:dansmith/chirp-snapshots
[sudo] password for e6400:
Press [ENTER] to continue or ctrl-c to cancel adding it
gpg: keyring `/tmp/tmpcedpuz7x/secring.gpg' created
gpg: keyring `/tmp/tmpcedpuz7x/pubring.gpg' created
gpg: /tmp/tmpcedpuz7x/trustdb.gpg: trustdb created
gpg: key 3BC5163F: public key "Launchpad PPA for Dan Smith" imported
gpg: Total number processed: 1
gpg: imported: 1 (RSA: 1)
OK
e6400@e6400-Latitude-E6400:~$ sudo apt-get update
404 Not Found
404 Not Found
Fetched 36.5 MB in 1min 56s (312 kB/s)
Reading package lists... Done
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Some index files failed to download. They have been ignored, or old ones used instead.
e6400@e6400-Latitude-E6400:~$ sudo apt-get install chirp-dailyReading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
ffmpegthumbs gir1.2-clutter-1.0 gir1.2-cogl-1.0 gir1.2-coglpango-1.0
gir1.2-gtkclutter-1.0 gstreamer0.10-plugins-base kde-l10n-engb libbaloocore4
libbaloofiles4 libbalooxapian4 libcdaudio1 libgstreamer-plugins-base0.10-0
libgstreamer0.10-0 libkface-data libkface3 libpgf6 libslv2-9 libsqlite0
variety-slideshow
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
python-suds
The following NEW packages will be installed:
chirp-daily python-suds
0 upgraded, 2 newly installed, 0 to remove and 171 not upgraded.
Need to get 519 kB of archives.
After this operation, 3,313 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Fetched 519 kB in 1s (314 kB/s)
Selecting previously unselected package python-suds.
(Reading database ... 255356 files and directories currently installed.)
Preparing to unpack .../python-suds_0.7~git20150727.94664dd-3_all.deb ...
Unpacking python-suds (0.7~git20150727.94664dd-3) ...
Selecting previously unselected package chirp-daily.
Preparing to unpack .../chirp-daily_20160415~xenial~1_amd64.deb ...
Unpacking chirp-daily (20160415~xenial~1) ...
dpkg: error processing archive /var/cache/apt/archives/chirp-daily_20160415~xenial~1_amd64.deb (--unpack):
trying to overwrite '/usr/bin/chirpw', which is also in package chirp 1:20160110-1
E: Sub-process /usr/bin/dpkg returned an error code (1)