Text of DNS events is not rendered correctly in the Global Logs node of Windows Server 2012 R2 DNS Manager if the August 2014 update rollup 2975719 or a later version of monthly update rollup is installed.
Here's the screen shot of the DNS event log message:
Resolution for Issue 1
To fix the issue that's described in the "Issue 1" section, install hotfix 3082532.
Note Hotfix 3082532 doesn't fix the issue that's described in the "Issue 2" section.