Trusty Syslog viewer states syslog file is not a normal file or is not a text file

While opening syslog, I get this message. gksudo gnome-system-log get it also.
I can open syslog.1 and all syslog.*.gz
I am in sudo and adm groups.
All files listed above are -rw-r----- 1 syslog adm when listed with
ls -l sysl*

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: gnome-system-log 3.8.1-1svn1
ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6
Uname: Linux 3.13.0-36-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.4
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Sep 25 12:19:30 2014
InstallationDate: Installed on 2014-07-17 (69 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: gnome-system-log
UpgradeStatus: No upgrade log present (probably fresh install)