In Apple's Discussion Forums, several people (for examples, click a, b, or c) are reporting a problem where highlighting file names in the Finder - so that you can edit the text - only lasts a few seconds before reverting to the unhighlighted form, often preventing you from finishing editing the text. So far, Apple is unable to duplicate the symptom (which similarly does not affect most users) and offers no definite solution. (Thanks, Kim Andersen)
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