This file is indexed.

/usr/share/icons/oxy-grey/index.theme is in oxygen-cursor-theme-extra 0.0.2012-06-kde4.8-2.1ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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[Icon Theme]
Name = Oxygen Grey
Comment = Oxygen mouse theme. Oxygenize your desktop!