Comment 2 for bug 1267665

libxi 2:1.7.1.901-1ubuntu1~precise1 was published in precise-updates pocket on the 6th of January

https://launchpad.net/ubuntu/+source/libxi/2:1.7.1.901-1ubuntu1~precise1

It appears as if on your system there are non standard pinning levels, and thus instead of installing from -updates pocket, libxi6 from -security pocket is installed. (990, 900)

Please note, that generally one does not need to rank -security pocket, higher than -updates pocket. As security updates always "trump" updates pocket, by strict version number comparison.