Okay, since I have to depend on what others see/report and without seeing your game myself, I'm stumped. I tried all the basic stuff given the information in this thread and even went into some odd areas from past experiences for troubleshooting. I'll have to wait for the report from Fred to see what he discovers if anything is damaged. If he can give you an effect, the cause can be diagnosed.
Steve
System 80, not just a job, it's an adventure