When you use scroll paging at the situation of subgrid, the event of click the expand icon may be triggered more than one time. This would cause the subgrid open then close.

1. you enable the scrollbar paging

2. if your data rows more than one page

follow the step described below, you will find this defect:

a. open a jqgrid with subgrid which uses scrollbar paging, it display normally and you can click the plus to expand subgrid

b. pagedown at the scrollbar, the expand icon's behaviour of current page work normally

c. scrol back to the previous page, you will find that the expand icon doen't work any more

d. trace the javascript and jqgrid source, you will find that the click event is triggered twice:first time it open the subgrid, second step. it closes the subgrid.