I am running Beta version 3.03 on Mac OS X version 10.11.3. When running a Net I have frequently noticed the following behavior on an intermittent basis:
1) I right click on a user in the checkins list to perform some action - usually to check him/her out.
2) The pop-up window of actions appears.
3) The mouse seems to be dead; i.e., the cursor stops responding to mouse movements.
4) The mouse comes back to life in about 20 seconds.
Since I have not seen any similar behavior with other applications, I am inclined to believe that the fault lies with NetLogger (vice OS X itself).
Other than this issue, the program is quite useful. I don't recall having this problem with version 2.96.
(frequent Net Control for The Maine Potato Net, M-F 7PM ET, 3958 KHZ +/-)