My girlfriend has become somewhat addicted to playing jewel and has discovered an intermittent bug.  I think that I have fixed it, but I am less than sure of the exact problem. This happened with both versions 301 and 352. The bug: Occasionally when ending the game  one of two things happens 1) The machine locks up.  The little spinning cursor pops up, you can move the mouse, but there seems to be no way to force plt to quit without shutting down the machine. 2) The dialog asking you for your name appears repeatedly.  After the first occurrence your name is entered in the high score table normally,  subsequent occurrences enter your sore in the table with the name "UNKNOWN".  This repeats until the high score tale has all lower scores than yours replaced with "UNKNOWN" The fix: My conjecture is that this was caused by the fact that the 'declife' function does not turn off the timer when the game is over, and so if you are in an 'UNSWAPPING' state you can enter the high score routine multiple times, and one of the functions called by the high score routines is not thread safe.  Keeping 'declife' from calling the high score routine more than once seems to have cured the problems, but one can never be sure.  Does this fix make sense? I should attempt to recreate the problem with a small snippet of code, but I am loath to lock may machine up in the interests of science.