It's a new feature called "insert-o-matic", which randomly toggles insert/typeover mode as you code. The faster you code, the higher chance it will activate.
It's a new feature Mark put in becuase there were complaints that programming in Blitz was too easy. And that seemed like the best method to artificially generate occasional syntax errors and the like to make it a little more challenging.
...
No really, there's no part of Blitz that does that... I would say you're actually hitting thie insert key while you hit hom or delete, or another program or button on your keyboard is to blame. (Do you have one of those new-fangled keyboards with the f-lock function keys?)
It's a new feature Mark put in becuase there were complaints that programming in Blitz was too easy. And that seemed like the best method to artificially generate occasional syntax errors and the like to make it a little more challenging.
...
No really, there's no part of Blitz that does that... I would say you're actually hitting thie insert key while you hit hom or delete, or another program or button on your keyboard is to blame. (Do you have one of those new-fangled keyboards with the f-lock function keys?)