[ChicagoRepublican]

The Poles did NOT charge tanks with cavalry. It was a myth which started from the fact that there would be battlefields with ruined tanks and dead soldiers and horses. The Polish Armed Forces lacked motorized transporation so units had to be transported on horses.

[rwb]

The Poles did NOT charge tanks with cavalry

I don't know, I wan't there, but I think that a few instances did occur.
Here's a website that supports your point of view:

http://mops.uci.agh.edu.pl/~rzepinsk/1939/html/cav.htm

Except the author forgot one thing. The Wermacht assault on Poland was highly organised, and all infantry was supported by armour.
The only thing I can say is that maybe at the time they didn't realise Nazi tanks were present.

[Robear]

Oh, well, then that's o.k. then...