[by cotrariello]

Try with this:

[by cotrariello]

try this

{
xtype: 'actioncolumn',
align: 'center',
items: [{
tooltip: 'your-message',
getClass:...

[by cotrariello]

Can you post the panel configuration code?

[by cotrariello]

so you use two panel
one that contain the combo and one for the form?

[by cotrariello]

Which browser use?
Did you set the config option:

[by cotrariello]

i don't understand the problem. explain better :D

[by cotrariello]

=D>:D:D:D

[by cotrariello]

so there aren't any errors? try to turn back to the 4.0.1.

[by cotrariello]

there is some error?

usertree it's the correct object?

the code don't execute the only refresh() function?

[by cotrariello]

try with usertree.view.refresh();

[by cotrariello]

thanks you very very very much for treeview.view.refresh()