No, it was unclear which precise set of circumstances caused mke2fs to not be happy. I tried a bunch of different alternatives from comments here when I said I could not reproduce it, that's because I hadn't hit the right set of circumstances: it's definitely not just randomly using fdisk or parted to create a partition table, people don't go around doing that themselves: they were hitting an issue related to the general partitioning scheme, either as done by us or as done by Windows, or even by something else (and in fact, is probably simply because of how the extended partitions work).
Still, regardless of the reason, there was never a question that adding -F would work; I just like to really understand what is happening before applying fixes rather than blindly doing something and hoping it will work.
No, it was unclear which precise set of circumstances caused mke2fs to not be happy. I tried a bunch of different alternatives from comments here when I said I could not reproduce it, that's because I hadn't hit the right set of circumstances: it's definitely not just randomly using fdisk or parted to create a partition table, people don't go around doing that themselves: they were hitting an issue related to the general partitioning scheme, either as done by us or as done by Windows, or even by something else (and in fact, is probably simply because of how the extended partitions work).
Still, regardless of the reason, there was never a question that adding -F would work; I just like to really understand what is happening before applying fixes rather than blindly doing something and hoping it will work.