The following bug has been logged on the website:
Bug reference: 9136
Logged by: Renato Ramonda
Email address: sys-milan(at)statpro(dot)com
PostgreSQL version: 9.2.6
Operating system: Ubuntu 12.04
Description:
The admin function pg_is_xlog_replay_paused() is read only and can be useful
for monitoring, as such it should NOT require superuser privileges (as it
does now).
For reference, the read-only functions for monitoring the replication delay
such as pg_current_xlog_location can be executed without superuser
privileges (as remarked by the official documentation here
http://www.postgresql.org/docs/9.1/static/functions-admin.html )