Add new row then delete the same new row = Javascript error

[mwmconsulting]

Sigma Team,

I have discovered a bug.  If you add a new row and then select the newly inserted row and click the "delete row" icon, it removes the row but the grid is no longer editable and you receive the following JS error when clicking anywhere on the grid:

Index or size is negative or greater than the allowed amount" code: "1

You can easily replicate this error on the following demo page:

http://www.sigmawidgets.com/products/sigma_grid2/demos/example_row_add_delete.html

I'm using Sigma 2.2.

Thx.

- MWM

[joeunderbar]

I have the same issue.  Anyone have a fix or workaround.  I tried the three div thing as suggested in another post, but no help...
Running 2.1.0

NOTE:  Ony happens with firefox.  Works OK in IE 8 and Chrome.