When running Alpha 14.1 ( Macbook Pro/OS 10.6.8 ) I find that more often than not, the interface won't recognize input from the keyboard (when trying to manually enter names, values, or report this as a bug via the built-in Feedback module.) Sometimes it will work the first time, but not after restarting a simulation or creating a new one. Is this a known issue? Can I expect it to be resolved in Alpha 15?