I created a ruler and usually change the font size to fit the purpose. I use a numeric keypad to enter numbers (yeah go ahead, call me old fashioned) and my fingers slipped and rather than entering 80, I entered 0 by accident.
Poof, in a blink AnyRail froze!!!
I stumbled upon this by accident right after I loaded my layout plan so luckily I did not lose anything. It was totally unexpected because AnyRail has always been rock solid for me.
Fun, fun. :)