you must replace! weird actions on an A500

[AmigaFreak]

I have an external floppy attached to my A500. Today I had the machine booted in to WB 1.3, and I had Extras 1.3 in the external drive. When I clicked on the icon for Extras 1.3 it started to load then exclaimed in a box "YOU MUST REPLACE Extras 1.3 IN DRIVE!" or something similar, so I clicked Retry and it says it several more times before it actually loads the disk all the way. What's going on with this drive?

[Zac67]

The disk-in sensor might be slowly falling apart, so Amy's thinking you removed the disk. Take a good look at the sensors, they're the little pins sticking up on the left side just inside the drive.

[Tricky]

It sounds like you've got the exact opposite problem I've got, it randomly thinks the disk has been removed, whereas mine seems to randomly think a disk has been briefly inserted.  It's certainly not something you want to happen whilst writing...