Part library search by typing bug?

We have a part library on a shared network drive that has maybe 200+ parts.

To navigate we'll generally start typing "nut" in the design library window of the task pane, and it will jump to "nut - acorn", "nut - klk", "nut - nylock", etc.

For some reason, the letter "C" doesn't register. We have about 18 files that start with "C" including all our casters. Any idea why there would be such a specific problem? Every other letter seems to register just fine.

We're on SolidWorks 2013 SP2.

SolidworksGeneral