Previously, while trying to use the Spreadsheet App with the calculator set for RPN entry, the keyboard locked up and I had to do a hard reset with the rear button to recover control of the calculator. Today, the calculator was simply sitting turned on and attached to the computer with the USB cable, when after some time doing nothing the keyboard again locked up and required a hard reset. I have yet to experience this problem with the calculator set for algebraic entry. Has anyone else experienced this strange behaviour with RPN entry mode ?
Edited: 21 Oct 2013, 3:07 p.m.