We are getting a problem with grid functionality after upgrading from 2.25 to 2.26. I have attached a test project. To see the problem:

• Run the attached solution
• Click on the "Tree List" menu item
• You will then see a grid at the top of the page
• On the first row, click into the text cell under "Column 2" (to the right)
• Now click into the next cell over at "Column 3"
• Now click again into that same cell
• You get the crash

We did not have this problem before version 2.26.

Just another note on this.

It appears that the presence of the checkbox columns causes the problem. Removing the checkbox columns causes the grid to work fine. Just having one checkbox template column in the grid causes the strange crash behavior in 2.26. Before 2.26, we had no problems with the checkbox templates impacting behavior.