Virtual rendering mode

When I up the number of rows to in your virtual.html example it
has a problem at row 55555 in both Firefox and IE. As I scroll down further it starts removing rows from the top of the grid as if it thinks the view able area has moved down.

i.e. what starts as

-----
0
1
2
3
-----

scrolls down to

----
55552
55553
55554
55555
----

then becomes

-----

55553
55554
55555
----

then

-----


55554
55555
----
etc until it finally becomes blank. Any ideas what is going on?

Yes, this is a bug in 2beta3 - the scrolling height is limited to 1000000px which is 55555 rows x 19px each