Hi David, thanks for the quick response! I'm running OSX 10.9.5 (Mavericks), English with 16GB of RAM (so plenty of memory). I didn't make note of exactly what other apps were running at the time, though I know for certain Microsoft Office for Mac was running and Chrome was running (though I've had this issue when I was using Firefox at the same time, so I don't think it is a conflict with either of those). Also itunes was running along with Creative Cloud and Dropbox. Once again, I don't think it has to do with other apps running. The issue has always happened when I am trying to edit a text layer - not when I first create it. I know this particular time I "cut" part of the text out by highlighting it, and this is when the rest suddenly was non-responsive to the arrow keys. Also, I was able to put my cursor in a particular spot (using my mouse to move it) and INSERT text, but was unable to use the delete key to delete text forward, but was able to delete text backward.
Finally, I'm using a magic mouse as my pointing device. This is on a MacBook Pro, though I am using a secondary monitor (Thunderbolt display) for Photoshop to load onto.
I'm in the Eastern time zone of the US.
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