New details emerging:

Ground invasion order was canceled twice at the last minute

On Monday night (Tues morning US time) Nachal soldiers received orders to move towards Gaza, opened the border gates, but at the last moment the action was delayed. (Thanks Hilary)

In fact at least twice the IDF was about to enter Gaza, the units received their orders, and then the order changed.

(rough translation from Maariv)

[link to translate.google.com]