I just found that this problem happened again on the latest SDK installation on 16.04 LTS:
iuxg@liuxg:~$ apt-cache policy ubuntu-sdk-ide ubuntu-sdk-ide: Installed: 3.5.1~133+201605270854~ubuntu16.04.1 Candidate: 3.5.1~133+201605270854~ubuntu16.04.1 Version table: *** 3.5.1~133+201605270854~ubuntu16.04.1 500 500 http://ppa.launchpad.net/ubuntu-sdk-team/staging/ubuntu xenial/main amd64 Packages 100 /var/lib/dpkg/status 3.5.1~133+201604191659~ubuntu16.04.1 500 500 http://ppa.launchpad.net/ubuntu-sdk-team/ppa/ubuntu xenial/main amd64 Packages
I just found that this problem happened again on the latest SDK installation on 16.04 LTS:
iuxg@liuxg:~$ apt-cache policy ubuntu-sdk-ide 201605270854~ ubuntu16. 04.1 201605270854~ ubuntu16. 04.1 201605270854~ ubuntu16. 04.1 500 ppa.launchpad. net/ubuntu- sdk-team/ staging/ ubuntu xenial/main amd64 Packages dpkg/status 5.1~133+ 201604191659~ ubuntu16. 04.1 500 ppa.launchpad. net/ubuntu- sdk-team/ ppa/ubuntu xenial/main amd64 Packages
ubuntu-sdk-ide:
Installed: 3.5.1~133+
Candidate: 3.5.1~133+
Version table:
*** 3.5.1~133+
500 http://
100 /var/lib/
3.
500 http://